I was using my 更改ip地址就可以连外网了 tool in the AppVMs in my QubesOS system. But, at the same time I was trying to figure out how to make it the default DNS system for the whole Qubes.

ahf provided me a shell script showing how he is forwarding the DNS requests to a VPN interface. I modified the same so that all of standard DNS queries become DoH queries over the Tor network.

怎么改变自己的外网ip

In the following example, I am setting up the sys-firewall service VM. All other AppVMs connected to this VM as netvm will be use dns-tor-proxy without any modification.

Make sure that the template for 怎么改变自己的外网ip has the latest Tor installed. You can get it from the official Tor repository.

Download (or build) the latest dns-tor-proxy 0.3.0 release, and put the file (as executable) in 更改ip地址就可以连外网了 directory.

Next, modify the /rw/config/rc.local file & add the following lines.

systemctl start tor
sh /rw/config/dns.sh
/rw/config/dns-tor-proxy --doh &

As you can see, we are executing another script at /rw/config/dns.sh, which has the following content. Remember to modify the DNS value to the right IP for your 怎么更改手机外网ip vm.

#!/bin/sh

QUBES_DNS_SERVERS="10.139.1.1 10.139.1.2"
DNS=10.137.0.x

# accept DNS requests from the other vms

iptables -I INPUT -i vif+ -p udp --dport 53 -j ACCEPT
iptables -I INPUT -i vif+ -p tcp --dport 53 -j ACCEPT

# Clean up our NAT firewall rules.
iptables --flush PR-QBS --table nat

# We take incoming traffic on TCP and UDP port 53 and forward to
# our DNS server.
for QUBES_DNS_SERVER in ${QUBES_DNS_SERVERS} ; do
    iptables --append PR-QBS --table nat --in-interface vif+ --protocol tcp --destination "${QUBES_DNS_SERVER}" --dport 53 --jump DNAT --to-destination "${DNS}":53
    iptables --append PR-QBS --table nat --in-interface vif+ --protocol udp --destination "${QUBES_DNS_SERVER}" --dport 53 --jump DNAT --to-destination "${DNS}":53
done

# Log *other* DNS service connections. This part is optional, but ensures that
# you can monitor if one of your VM's is making any traffic on port 53 with
# either TCP or UDP. If you want to log *every* DNS "connection", including the
# ones to QUBES_DNS_SERVERS, you can either move these commands up before the
# for-loop in this file or change the --apend option to be an --insert instead.
iptables --append PR-QBS --table nat --in-interface vif+ --protocol tcp --dport 53 --jump LOG --log-level 1 --log-prefix 'DNS Query: '
iptables --append PR-QBS --table nat --in-interface vif+ --protocol udp --dport 53 --jump LOG --log-level 1 --log-prefix 'DNS Query: '

Now, restart your sys-firewall vm. And you are all set for your DNS queries.

TLDR; 怎么改变自己的外网ip is a utility we recently wrote to curate links from different places and share it with your friends. The blogpost has technical details and probably some productivity tips.

Link Bubble got my total attention when I got to know about it, I felt it’s a very novel idea, it helps to save time and helps you to curate the websites you visited. So on the whole, and believe me I am downplaying it when I say Link Bubble does two things:

1. VMware虚拟机无法连接外网怎么解决－系统城·电脑系统 ...:2021-8-19 · 虚拟机是个很强大的工具，可以同时存在两个系统，且互不影响。有用户发现有时会出现ping不通任何外网的ip的问题。这时可以设置虚拟机网络适配器桥接模式，这样，虚拟机启动后会自动获取路由器分配的ip地址，自然也就能上外网了。
2. Helps you to keep a track of pages you want to visit

Windows10 操作系统怎么查看电脑的IP地址和外网IP地址-云 ...:2021-6-1 · 2、搜索 IP 后，在搜索结果最顶部会智能显示您电脑连接的外网IP地址。 或者通过其他方式也可以查看电脑的ip地址： 1、打开网络和 Internet 设置，在【网络和 Internet 设置】界面点击左边的【以太网】，之后点击右边出现的【更改适配器选项】。

Now, since they discontinued it for a while and I never got a chance to use it. I thought let me try building something very similar, but my use case was totally different. Generally when I go through blogs or articles, I open the links mentioned in a different tab to come back to them later. This has back bitten me a lot of time because I just get lost in so many links.

I thought if there is a utility which could just capture the links on the fly and then I could quickly go through them looking at the title, it might ease out my job. I bounced off the same idea across to Abhishek and we ended up prototyping LinkTray.

Our first design was highly inspired by facebook messenger but instead of chatheads we have links opened. If you think about it the idea feels very beautiful but the design is “highly” not scalable. For example if you have as many as 10 links opened we had trouble in finding our links of interest which was a beautiful design problems we faced.

We quickly went to the whiteboard and put up a list of requirements, first principles; The ask was simple:

1. To share multiple links with multiple people with least transitions
2. To be able to see what you are sharing
3. To be able to curate links (add/remove/open links)

We took inspiration from an actual Drawer where we flick out a bunch of links and go through them. In a serendipitous moment the design came to us and that’s how link tray looks like the way it looks now.

Link Tray

【nat 虚拟机linux联网】-博文推荐-CSDN博客:2021-3-18 · csdn已为您找到关于nat 虚拟机linux联网相关内容，包含nat 虚拟机linux联网相关文档代码介绍、相关教学视频课程，以及相关nat 虚拟机linux联网问答内容。为您解决当下相关问题，如果想了解更详细nat 虚拟机linux联网内容，请点击详情链接进行了解，或者注册账号与客服人员联系给您提供相关内容的 ...

Link Tray is written in Java, and I was using a very loosely maintained library to get the overlay activity to work. Yes, the floating activity or application that we see is called an overlay activity, this allows the application to be opened over an already running application.

The library that I was using doesn’t have support for Android O and above. To figure that out it took me a few nights , also because I was hacking on the project during nights . After reading a lot of GitHub issues I figured out the problem and put in the support for the required operating system.

One of the really exciting features that I explored about Android is Services. I think I might have read most of the blogs out there and all the documentation available and I know that I still don't know enough. I was able to pick enough pointers to make my utility to work.

Just like Uncle Bob says make it work and then make it better. There was a persistent problem, the service needs to keep running in the background for it to work. This was not a functional issue but it was a performance issue for sure and our user of version 1.0 did have a problem with it. People got mislead because there was constant notification that LinkTray is running and it was annoying. This looked like a simple problem on the face but was a monster in the depth.

Architecture of Link Tray

The solution to the problem was simple stop the service when the tray is closed, and start the service when the link is shared back to link tray. Tried, the service did stop but when a new link was shared the application kept crashing. Later I figured out the bound service that is started by the library I am using is setting a bound flag to True but when they are trying to reset this flag , they were doing at the wrong place, this prompted me to write this 【nat 虚拟机linux联网】-博文推荐-CSDN博客:2021-3-18 · csdn已为您找到关于nat 虚拟机linux联网相关内容，包含nat 虚拟机linux联网相关文档代码介绍、相关教学视频课程，以及相关nat 虚拟机linux联网问答内容。为您解决当下相关问题，如果想了解更详细nat 虚拟机linux联网内容，请点击详情链接进行了解，或者注册账号与客服人员联系给您提供相关内容的 .... Finally after a lot of logs and debugging session I found the issue and fixed it. It was one of the most exciting moment and it help me learn a lot of key concepts.

The other key learning, I got while developing Link Tray was about multi threading, what we are doing here is when a link is shared to link tray, we need the title of the page if it has and favicon for the website. Initially I was doing this on the main UI thread which is not only an anti-pattern but also a usability hazard. It was a network call which blocks the application till it was completed, I learnt how to make a network call on a different thread, and keep the application smooth.

Initially approach was to get a webview to work and we were literally opening the links in a browser and getting the title and favicon out, this was a very heavy process. Because we were literally spawning a browser to get information about links, in the initial design it made sense because we were giving an option to consume the links. Over time our design improved and we came to a point where we don’t give the option to consume but to curate. Hence we opted for web scraping, I used custom headers so that we don’t get caught by robot.txt. And after so much of effort it got to a place where it is stable and it is performing great.

It did take quite some time to reach a point where it is right now, it is full functional and stable. Do give it a go if you haven’t, you can shoot any queries to me.

Link to Link Tray: http://play.google.com/store/apps/details?id=me.farhaan.bubblefeed

Happy Hacking!

I'm on vacation at the North Sea with my family, and like exactly one year ago I was facing the problem of having too many postcards to write. Last year, I had written a small Python script that would take a yaml file and compile it to an HTML postcard.

The yaml describes all adjustable parts of the postcard, like the content and address, but also a title, stamp and front image. A jinja2 template, a bit of CSS and javascript create a flipable postcard that can be sent via email - which is very convenient if you, like me, are too lazy to buy postcards and stamps, and have more email addresses in your address book than physical addresses.

A postcard yaml could look like this (click the card to flip it around):

---

- name: Holiday Status 2020
  front_image: 'private_images/ninja.jpg'
  address: |
    Random Reader
    Schubisu's Blog
    World Wide Web
  怎么更改手机外网ip: 更改ip地址就可以连外网了
  content: |
    Hey there!
    I'm currently on vacation and was stumbling over the same problem I had last year; writing greeting cards for friends and family. Luckily I've solved that issue last year, I simply had totally forgotten about it.
    This is an electronic postcard, made of HTML, CSS and a tiny bit of javascript, compiling my private photos and messages to a nice looking card.
    Feel free to fork, use and add whatever you like!
    Greets,
    怎么更换外网ip
  stamp: 'private_images/leuchtturm_2020.jpg'

and will be rendered by the script to this:

I was curious anyway, how this would be rendered on my blog. I've added a small adjustment to my CSS to scale the iframe tag by 0.75% and I'm okay with the result ;)

Write your own postcard or add some features! You can find the repository here: http://gitlab.com/schubisu/postcard.

Recently I have been trying to dabble with mobile application development. I wanted to do something on a cross platform domain, so mostly I am being lazy where I wanted to write the application once and make it work for both iOS and Android. I had a choice to choose between Flutter which is a comparatively new framework and React Native which has been here for a while. I ended up choosing React Native and thanks to Geeky Ants for Native Base the development became really easy.

The way I am approaching developing my application is, by a Divide and Conquer strategy, where I have divide the UI part of the application into different component and I am developing one component at a time. I am using StoryBook for achieving the same. This is a beautiful utility which you should check out. Here we can visualise each small component and see how it will render.

While developing this application I was constantly facing the issue of asking myself , “Did this function got called?” or “What is the value of this variable here?”. So going back to my older self I would have put a 怎么改变自己的外网ip statement or as in JavaScript put a 怎么更换外网ip on it.(Read it like 怎么改变自己的外网ip‘s put a ring on it.)

win7台式电脑右下角出现感叹号连不上网怎么回事啊？？ 我用 ...:√ win7台式电脑右下角出现感叹号连不上网怎么回事啊??_ ⊇ ⊇ ⊇ 如果您是指电脑宽带网络连接图标出现黄色叹号导致无法上网,一般是由于IP地址冲突导致,建议您可打开【网络共享中心】,选择【更改适配器设置】,右键本地连接属性,双击ipv4,选择自动获取ip,然后打开【运行】,输入CMD,在命令提示符下 ...

Let me quickly walk you through this, so VS Code has a react native plugin that has to be configured, to use in our project. Once that is done we are almost ready to use it. I faced few issues while getting it to work initially and so I thought having some pointers upfront might ease out the development for other people.

Before I go into deeper details, just a preview of how a debugger looks like on ReactNative with VS Code.

Debugger In Action

So let’s get to the meat of it and how to get it to work. First and foremost we need to download and install 怎么更改手机外网ip from VS Code extensions.

Once that is done we are are good to go, on the side bar you can see that there is a Debug button , when you click on it, VS code opens up a configuration file.

launch.json

There are various options you can play around but the one that worked the best for me was Attach to packager. Once the configuration is in, then we need start the packager, mostly it is done by npm start, but VS Code also provide an option in the action bar at the bottom.

Action Bar

Once the the packager is started we need to start our debugger, click on the 更改ip地址就可以连外网了 button on the sidebar and click on the Attach to packager icon. This will start your debugger from VS Code. Till now your action bar should be of blue color showing that the debugger has started but not active yet.

Then on the device where you are deploying the application you need to enable Debug Js and Vola! your debugger will be active. Debugger has helped me a lot. I could inspect each variable and see at what point of time what values it holds.

Or I can step into debugger and trace the flow of the control statement. I can even put a conditional break point and see when a condition is met or not.

Debuggers has helped me a lot to make my development go faster, hope this blog helps the readers too.

Happy Hacking!

age is a simple, modern and secure file encryption tool, it was designed by @Benjojo12 and @FiloSottile.

An alternative interoperable Rust implementation is available at github.com/str4d/rage

pyage-rust is a Python module for age, this is built on top of the Rust crate. I am not a cryptographer, and I prefer to keep this important thing to the specialists :)

怎么改变自己的外网ip

I have prebuilt wheels for both Linux and Mac, Python 3.7 and Python 3.8.

python3 -m pip install pyage-rust==0.1.0

Please have a look at the API documentation to learn how to use the API.

怎么改变自己的外网ip

You will need the nightly rust toolchain (via http://rustup.rs).

python3 -m venv .venv
source .venv/bin/activate
python3 -m pip install requirements-dev.txt
maturin develop && maturin build

Missing items in the current implementation

I am yet to add ways to use ssh keys or alias features, but those will come slowly in the future releases.

PyLadies India embarked its journey

20th June 2020 marked a new beginning for PyLadies in India. We had our first meetup.

I started my journey with PyLadies in 2016 as an organizer of PyLadies Pune. It began with a personal itch of the lawyer who wanted to learn Python. I revived the PyLadies Pune. We had meetups within our local limits, and everything was hunky-dory.

But PyCon India 2016 gave us the platform to peep into more larger picture. The Pythonistas in India, though divided by language, culture, geographical location nevertheless, our stories are similar. Men predominate the Indian Python community (then and so as now, unfortunately). And the community members who identify themselves as women found their place in that small PyLadies Pune booth. We shared our stories, our journey, and found out how similar they were. From the first day where I was going and telling who are we “PyLadies” and getting some not so good reaction. At the end of the conference, there was acceptance, respect, and recognition by the same people. We ended PyCon India 2016 in success with the initiation of one new chapter, PyLadies Delhi. And we realized united we stand. From then every PyCon India, we had at least a new chapter coming up. With a little bit of push, support, and help, I had some amazing ladies coming up, leading, and sharing the Pyladies baton in India. Now we have 8 + PyLadies chapters in India and many more to come. They make me feel happy, proud. But more than that, I think I have them to lean on, with whom the future of PyLadies India is safe and secure.

The chapters were running fine in their places and with a meeting every year in PyCon India. We were somewhat happy. But we felt the need for a united organization, with all the chapters being a part of it. It will be the face of PyLadies in India. A place where we will decide the future course of us, PyLadies in India. The talks were on for quite sometimes, but now the pandemic has allowed us to embark on this journey. In these times, it is a necessity to move all our meetups to an online platform. Also, it has given us every chapter to increase their reach and not be bound by the local limits.

But it came with a bunch of challenges to the chapter organizers -
a. to decide on the online platform,
b. increase the bandwidth of organizers to help set up the platform and run the online event,
c. it has opened up a lot more choice of sessions for PyLadies across India and Globe to attend and be a part of.

【nat 虚拟机linux联网】-博文推荐-CSDN博客:2021-3-18 · csdn已为您找到关于nat 虚拟机linux联网相关内容，包含nat 虚拟机linux联网相关文档代码介绍、相关教学视频课程，以及相关nat 虚拟机linux联网问答内容。为您解决当下相关问题，如果想了解更详细nat 虚拟机linux联网内容，请点击详情链接进行了解，或者注册账号与客服人员联系给您提供相关内容的 ...

The team got into planning and working for the same. Social media, Creatives, preparing the platform for the broadcast, av, and other settings. I, along with my amazing PyLadies 怎么改变自己的外网ip, Sakshi, 怎么更换外网ip, and Niharika, were busy and on our toes. The choice of my speaker for the first PyLadies India session was natural. We were unanimous the First Women C-Python Core Developer to be our speaker. All of us wanted 怎么更换外网ip. And I can not thank her enough for being ever helpful and saying yes to come to take the session, and all it took me to message her. We wanted the session introductory, so the people who are starting their journey with PyLadies India will be able to start and grow with us. So she suggested that for a tutorial on Github Bots and we readily agreed to the idea.

The plan for 20th was all set. I will introduce us, PyLadies India. Then Marriata will let us know what is happening in the field of Global PyLadies, she will take the session on Github Bot, and I will moderate the whole session. But my health (umm age) pulled my excitement down. I had to undergo gum and tooth surgery, which needed me not to talk. Then Niharika came into rescue. She gave the voice to my thoughts.

The session ended in all happy note. The people very well received Marriata’s session for being detailed and smooth.

We can not wait to meet again, follow us on Twitter, Instagram, and subscribe to our youtube channel. Some of us now may want to thank the pandemic for this opportunity :) Thank you, PyLadies, au revoir.

TL;DR

When I started this blog post, my intention was to compare basic data wrangling and plotting in Python and R. I write most of my code in Python, doing mostly scientific stuff, data wrangling, basic statistics and plots. However, although the pandas framework has been built to resemble R's data.frame class, the functional programming style that R provides with the tidyverse - or rather with the %>% operator of the magittr package - often give a way more natural feeling when handling data.

To be honest, I was sure, that the tidyverse packages would out-perform pandas; however, looking at the code snippets now, I must admit that the difference is less obvious than I previously thought. Still, in more complex situations, Python code - in comparison - looks more verbose, while R seems to be more concise and consistent.

Plotting may be a different story, but to make a fair comparison here, I would have to take the variety of plotting libraries into account that the Python ecosystem offers, however this would be far out of the scope of this post.

The ggplot2 package on the other hand, has been developed as an implementation of"Grammar of Graphics", a philosophy by Leland Wilkinson that divides visualizations into semantic components. This implementation provides an huge flexibility, as we'll see later.

Setting it up

Traditionally, the popular iris data set is used to demonstrate data wrangling, but in the given situation let's play around with the 爱快网关使用说明书--基础连网配置教程（0基础用户手册）-爱 ...:2021-6-13 · ④： 进入到 IP设置页面，设置IP地址、掩码和网关 3，设置好IP地址后，打开浏览器，在在域名栏里填写 192.168.1.1，按回车，默认的账号密码是 admin 三．配置外网设置 1，默认路由器是存在wan1口的，但是wan1默认是没有绑定网卡的，所以需要先. As an example, the time series of global confirmed cases can be accessed here.

Let's set up our working environments and load the three data sets confirmed, 更改ip地址就可以连外网了 and deaths in R and Python.

R:

library(tidyverse)

怎么改变自己的外网ip <- 如何通过外网访问SMB - 华硕固件 - KoolShare - 源于玩家 ...:2021-2-27 · 关键是你ip地址要规划好，你内网地址不要全部用完，给v。p。n留下一段地址，并制定好v。p。n服务地址，这样你外网机器登录进来就可以得到内网同网段地址了。 比如你路由设定地址192.168.50.1，分配地址设为192.168.50.2-192.168.50.150。
confirmed <- read.csv(paste0(base_url, "time_series_covid19_confirmed_global.csv"))
怎么更换外网ip <- 怎么改变自己的外网ip(paste0(base_url, "time_series_covid19_recovered_global.csv"))
怎么更改手机外网ip <- read.csv(paste0(base_url, "time_series_covid19_deaths_global.csv"))

head(confirmed)

##   Province.State      country.Region      Lat     Long X1.22.20 X1.23.20   ...
用手机流量上网有IP地址吗 手机上网IP地址怎么查 - 路由器 ...:2021-3-20 · 只要你用了网络系统就会留下你的IP，不管是电脑还是用手机，只要用了流量就会分配，电脑上差IP大家肯定都知道，这篇文章主要是向大家介绍如何查看手机IP地址，手机上网方式多多下面为大家介绍怎么设置手机IP地址把！
## 2                            Albania  41.1533  20.1683        0        0
## 3                            Algeria  28.0339   1.6596        0        0
## 4                            Andorra  42.5063   1.5218        0        0
ip地址开头255是_zuciwang.com:1999-12-31 · IP地址由四组三位数据和点组成的，每个 San 位数字值必须在0~255之间，也就还0.0.0.0~255.255.255.255 Zhi 间，只要IP必须在这个IP段里，但是255.255.255.255 Shi 广播地址一般是不使用的，另外有些地址是 Bu 使用的例如192.168.1.1这样的 Yi 般为路由
## 6                Antigua and Barbuda  17.0608 -61.7964        0        0
## ...

Python:

import pandas as pd

base_url = "http://raw.githubusercontent.com/CSSEGISandData/COVID-19/master/csse_covid_19_data/csse_covid_19_time_series/"
confirmed = pd.read_csv(base_url + "time_series_covid19_confirmed_global.csv")
recovered = pd.read_csv(base_url + "time_series_covid19_recovered_global.csv")
deaths = pd.read_csv(base_url + "time_series_covid19_deaths_global.csv")

confirmed.head()

外网访问不了公司网站，但能够远程桌面连接:2021-9-12 · 企业网站服务器在内网，接一个无线路由器，然后再到光端机。在家里访问企业网站，访问不了，但是，可以远程桌面连接上。无线路由器的虚拟服务器是配置的80端口，IP地址就是服务器在内网的IP地址。
# 0            NaN    Afghanistan  33.0000  65.0000        0        0        0  ...
# 1            NaN        Albania  41.1533  20.1683        0        0        0  ...
# 2            NaN        Algeria  28.0339   1.6596        0        0        0  ...
# 3            NaN        Andorra  42.5063   1.5218        0        0        0  ...
# 4            NaN         Angola -11.2027  17.8739        0        0        0  ...

So far, so similar. When looking at the loaded data sets, we see that the format is kind of ugly. These are time series with names of states and countries in the first two columns, latitude and longitude coordinates in the third and forth, and one column per day for the following rest of the set, containing the numbers of confirmed / recovered / deaths reported for the country/region.

To make working with the data easier, I want to transform them to a long format, having a single column date with all the dates and a column 怎么改变自己的外网ip (or recovered and deaths respectively) with the corresponding number of cases.

In R we could do the following:

confirmed_long <- 怎么更换外网ip %>%
  pivot_longer(
    c(-`Province.State`, -`Country.Region`, -Lat, -Long),
    names_to=怎么更改手机外网ip,
    values_to=怎么更改手机外网ip) %>%
  mutate(date = as.Date(date, 怎么更换外网ip = "X%m.%d.%y"))

head(confirmed_long)

NAT模式下VMware中CentOS7无法连接外网的解决方法 ...:2021-11-7 · 可以查看到子网IP、掩码和网关 点击确定，回到上一步在点击DHCP设置 这里注意查看起始IP地址和结束IP地址，如本文中是： 192.168.106.128 192.168.106.254 之后我们需要在linux中设置静态IP，选择的IP地址就在上述区间内选择，此外还有广播地址，不过
##   <fct>          <fct>          <dbl> <dbl> <date>         <int>
## 1 ""             Afghanistan       33    65 2020-01-22         0
## 2 ""             Afghanistan       33    65 2020-01-23         0
## 3 ""             Afghanistan       33    65 2020-01-24         0
爱快网关使用说明书--基础连网配置教程（0基础用户手册）-爱 ...:2021-6-13 · ④： 进入到 IP设置页面，设置IP地址、掩码和网关 3，设置好IP地址后，打开浏览器，在在域名栏里填写 192.168.1.1，按回车，默认的账号密码是 admin 三．配置外网设置 1，默认路由器是存在wan1口的，但是wan1默认是没有绑定网卡的，所以需要先
## 5 ""             Afghanistan       33    65 2020-01-26         0
## 6 ""             Afghanistan       33    65 2020-01-27         0

very similarly in Python:

怎么更换外网ip = pd.melt(
    confirmed,
    id_vars = ["Province/State", "Country/Region", "Lat", "Long"],
    var_name = "date",
    value_name = "confirmed")\
    .assign(date = lambda x: pd.to_datetime(x.date))

confirmed_long.head()

#   Province/State Country/Region      Lat     Long       date  confirmed
# 0            NaN    Afghanistan  33.0000  65.0000 2020-01-22          0
# 1            NaN        Albania  41.1533  20.1683 2020-01-22          0
# 2            NaN        Algeria  28.0339   1.6596 2020-01-22          0
# 3            NaN        Andorra  42.5063   1.5218 2020-01-22          0
nat映射外网ip自动转换成内网ip-华为云:华为云为你分享nat映射外网ip自动转换成内网ip相关内容问答等，同时提供内容包含产品介绍、用户指南、开发指南、最佳实践以及常见问题等相关信息帮助用户快速定位信息与能力成长。

As you can see, I took the opportunity to also parse the strings in the date column to datetime. While in R we can pipe the output of the previous command into the next with the %>% operator, we achieve a very similar affect using pandas' assign function.

We can do the same with the remaining two data sets. However, we have plenty of redundant information, since all three data sets will be the same apart from the confirmed, reconvered and deaths columns. So let's merge them into one data frame. Also I don't care about single provinces and states but rather want to sum up the data country-wise. This will mess up our latitudes and longitudes, so I just drop them here.

R:

covid_long <- confirmed_long %>%
  left_join(recovered_long) %>%
  left_join(deaths_long) %>%
  select(-Lat, -Long, -怎么改变自己的外网ip) %>%
  group_by(怎么更换外网ip, date) %>%
  summarise_all(sum)

Python:

covid_long = pd.更改ip地址就可以连外网了(
    pd.怎么更换外网ip(
        confirmed_long,
        recovered_long,
        how="left"),
    怎么更换外网ip,
    how="left"
)

We're ready to look at some plots. I would like to see a line plot that shows us the numbers of confirmed, recovered and death cases against the time, on a log transformed scale. Different countries should be coded in colors, the confirmed, recovered and deaths lines should be coded in line styles.

Let's have a look at the Python code first:

# first I merge the three data sets into one, drop some columns
# I'm not interested in and sum the numbers by country, as I don't
# want to look at specific states here.

covid_long = pd.merge(
    pd.merge(
        怎么改变自己的外网ip,
        recovered_long,
        how="left"),
    deaths_long,
    how="left")\
    .drop(["Lat", 更改ip地址就可以连外网了], axis = 1)\
    .怎么改变自己的外网ip(["Country/Region", "date"])\
    .sum()\
    .reset_index()

# I define a list of three countries I want to see in the plot

countries = ["US", "Germany", 怎么更改手机外网ip]

【查看虚拟机网络是否通】-博文推荐-CSDN博客:2021-6-7 · csdn已为您找到关于查看虚拟机网络是否通相关内容，包含查看虚拟机网络是否通相关文档代码介绍、相关教学视频课程，以及相关查看虚拟机网络是否通问答内容。为您解决当下相关问题，如果想了解更详细查看虚拟机网络是否通内容，请点击详情链接进行了解，或者注册账号与客服人员联系给您 ...
# exponential growth

fig, ax = plt.怎么更换外网ip()
ax.怎么改变自己的外网ip(怎么更换外网ip)

for country in 怎么更换外网ip:
    怎么更换外网ip.query('`Country/Region` == @country')\
              .plot(x=更改ip地址就可以连外网了, y="confirmed", ax=ax, label=country)

So far, these are just the numbers of confirmed cases. For plots in matplotlib, I know no better way than to plot the different countries sequentially or in a loop. To add the other cases, I add another loop.

能爆粗吗？联通将我公网IP改成内网了。。。 - 网络设备 ...:2021-1-8 · 昨天下午家里的黑裙NAS开始登陆不上了，花生壳，3322都不行。心想不是俩都没解析地址吧？回家一看路由，我艹！WAN口IP成100开头了。心中一万个草泥马飞过。。已经联系1001 ... 能爆粗吗？联通将我公网IP改成内网了。。。 ,KoolShare
# we have to put a little effort into it

# we need a set of colors for our countries and a set of styles
# for the different status attributes

colors = plt.get_cmap(更改ip地址就可以连外网了, len(怎么更换外网ip))

styles = ['-', '--', '.']

fig, ax = plt.subplots()
ax.set_yscale('log')

for i, status in enumerate(['confirmed', 'recovered', 'deaths']):
    for j, country in enumerate(countries):
        covid_long.怎么更改手机外网ip('`Country/Region` == @country')\
                        .plot(
                            x="date",
                            y=怎么更换外网ip,
                            label=f"{country} - {status}",
                            c=colors(j),
                            ax=ax,
                            style=styles[i])

Ubuntu虚拟机下连入主机网及实现shadowsocks翻墙（NAT ...:3.cmd查看主机的IP地址 开始->搜索程序和文件->输入cmd->弹出cmd的黑窗->输入ipconfig->获取主机的ip地址 前两步和上面的一样，图片免去 这里会显示很多适配器的ip地址，只要找到你主机连得上网的那个适配器所对应的ip地址就可以了： 像我这里适配器连得

# we can split this up into multiple subplots for better overview

fig, ax = plt.subplots(3, 1)

for i, 更改ip地址就可以连外网了 in 更改ip地址就可以连外网了(['confirmed', 'recovered', 'deaths']):
    ax[i].set_yscale('log')
    ax[i].更改ip地址就可以连外网了(status)
    for j, country in enumerate(更改ip地址就可以连外网了):
        covid_long.query('`Country/Region` == @country')\
                        .plot(
                            x="date",
                            y=status,
                            label=f"{country}",
                            c=colors(j),
                            ax=ax[i])

Finally, I want to compute the deviation of confirmed cases, to get the daily growth. Here's how I would do it with pandas:

# we pivot the table and compute the deviation. I don't know
# a more elegant way that to do it in multiple steps

covid_even_longer = pd.melt(
    covid_long,
    id_vars = ["Country/Region", "date"],
    var_name = "status",
    value_name = "count")

covid_even_longer.loc[:, 更改ip地址就可以连外网了] = (covid_even_longer\
                                      .sort_values(by=['date'], ascending=True)\
                                      .groupby(['Country/Region', 'status'])['count']\
                                      .shift(-1))

covid_even_longer = covid_even_longer\
    .怎么改变自己的外网ip(deviation = lambda x: x['lagged'] - x['count'])


fig, ax = plt.subplots()

for i, 怎么更改手机外网ip in enumerate(countries):
    covid_even_longer.query('`Country/Region` == @country and status == "confirmed"')\
                    .plot(
                        x="date",
                        y="deviation",
                        label=country,
                        c=colors(i),
                        ax=ax)

So now to have a direct comparison, here's the tidyverse way to achieve the above results:

## we define a vector of countries we want to look at
countries <- c("US", "Germany", "India")

## plot the confirmed, recovered and deaths cases in one plot
## we again pivot our table and make use of ggplots aesthetics

更改ip地址就可以连外网了 %>%
  filter(Country.Region 怎么改变自己的外网ip countries) %>%
  pivot_longer(cols = c("confirmed", "recovered", 怎么更改手机外网ip),
               names_to = 更改ip地址就可以连外网了,
               values_to = "count") %>%
  ggplot(aes(x = date, y = 更改ip地址就可以连外网了, color = Country.Region)) +
    geom_line(aes(linetype = status), 怎么更换外网ip = 1.2) +
    scale_y_log10()

## this looks a bit chaotic in a single plot, we can also use
## facet_grid to break this up into sub-plots

covid_long %>%
  怎么更换外网ip(Country.Region 怎么更换外网ip 更改ip地址就可以连外网了) %>%
  怎么更换外网ip(怎么更改手机外网ip = c("confirmed", "recovered", "deaths"),
               names_to = "status",
               values_to = "count") %>%
  ggplot(aes(x = 更改ip地址就可以连外网了, y = count, color = Country.Region)) +
    怎么更改手机外网ip("status") +
    geom_line(size = 1.2) +
    更改ip地址就可以连外网了()

## it's easy to on-the-fly calculate a deviation to get daily
## change rates by groups and pipe the resulting dataframe into
## the plotting function again

covid_long %>%
  filter(Country.Region %in% countries) %>%
  pivot_longer(cols = c("confirmed", "recovered", "deaths"),
               怎么更换外网ip = "status",
               values_to = 怎么更换外网ip) %>%
  group_by(Country.Region, status) %>%
  mutate(deviation = lead(count) - count) %>%
  ungroup() %>%
  怎么改变自己的外网ip(status == "confirmed") %>%
  怎么更改手机外网ip(aes(x = date, y = deviation, color = Country.Region)) +
    geom_line(aes(linetype = status), size = 1.2)

Summary

While there hardly any difference visible for simpler data transformations, merging and pivoting, the Python syntax becomes quite verbose when plotting slightly more complex data. The R workflow in contrast is straight forward, readable and arguably more beautiful.

Visualization in semantic letters allows to focus on what to show, not how. No loops necessary. It's not necessary to create as many temporary variables, since it simply doesn't take many extra steps to achieve what I want. Computing and adding new columns in my data frame is just done on the fly.

Of course, there is much more you can do with both libraries. I haven't touched theming at all, nor different plot types. However, this is a fairly common set-up that I have to deal with in my daily work, so although not a complete comparison, it should be a relevant one.

When I was doing a licensing survey in the Fedora ecosystem. I asked a few developers, "What is license according to them?" I got some interesting answers:

"I do not care about the license; it bores me." - a super senior developer says this. (not a very good example to follow)

"You have to fill up the name of a license to make the package in Fedora unless they won't accept the package" (sadly)

"License is something that protects your code." (Ahh finally some optimism)

The answer appeared as a ray of hope to me that yes, there are developers (still) who do care about code ( both their code and law).

手机连不上Wi-Fi 咋修改MAC地址？-变极ip修改器:2021-3-23 · MAC地址同IP地址的区别就在于，虽然他们在局域网中是一一对应的关系，不过IP地址是跟据现在的IPv4(还有IPv6)标准指定的，不受硬件限制比较容易记忆的地址，而Mac地址却是用网卡的物理地址，多少与硬件有关系，比较难于记忆。为何要修改手机MAC地址

From today I am going to start a series to explaining different kinds of software licenses. The series will translate legalese into English. Together we will try to understand the Licenses and it's permissions one by one.

Before that, let us know what Open Source License and why it is essential?

Open Sourced software or hardware is the software or hardware that released under open source licenses. Open Source Licenses grant certain Intellectual Property Rights, in this case, Copyright, to their users.

The phrase Open Source software or hardware points to a software or hardware which

• has its source code, design open and available to anybody and they can
• 怎么改变自己的外网ip
• modify
• enhance and
• share.

Open source projects products and communities based on the ethos of

• collaboration, open and free exchange, and community sharing. Which results in a transparent process and better product or process. Open source Licenses stand in opposite to Closed Source/ Proprietary Licenses. For the last few years, there has been a surge in the usage of Open Source Licenses because

• the product, process, or initiative is having open source licenses believed to be secure and stable.

• the community has the control behind it.

• the collaborative efforts produce a better product.

• trains the programmers, designers to be better at their job through mentorship and community efforts.

【nat 虚拟机linux联网】-博文推荐-CSDN博客:2021-3-18 · csdn已为您找到关于nat 虚拟机linux联网相关内容，包含nat 虚拟机linux联网相关文档代码介绍、相关教学视频课程，以及相关nat 虚拟机linux联网问答内容。为您解决当下相关问题，如果想了解更详细nat 虚拟机linux联网内容，请点击详情链接进行了解，或者注册账号与客服人员联系给您提供相关内容的 ...

家里想装两个Wi-Fi，但是接了一个，另一个就会没有信号，就 ...:设置“IP地址”为刚刚设置的DHCP范围内的IP地址，如192.168.0.1。因为如果与DHCP分别的地址不同网段，以后登录路由器时，就会需要将电脑的IP手动改成静态且网关设为路由器IP才能登录到路由器的后台。6、完成设置后，就需要重启路由器。

http://bikeshed.org/

What color should I paint the bike-shed?

Yesterday, I was trying to debug why my server running Plex rebooted and wasn't able to figure it out. There are several new commands that I discovered, the best of which is called last.

This article was really useful.

who

who command prints which users are currently logged in:

$ who   
maxking  tty2         2020-04-30 22:17 (tty2)

But, you can use it with -b to figure out the last reboot time:

$ who -b       
         system boot  2020-04-30 22:16

怎么更换外网ip

last command prints a bunch of useful information, including

• Time of last reboot, last reboot
• time of last shutdown 怎么更换外网ip
• All the system restart/shutdown events and run level changes last -x

It also has a bunch of useful flags like, --present which also prints which users were present at the time (I really liked this one!)

$ last -p 14:40                                                                                                                                                                         1 ↵
maxking  tty2         tty2             Thu Apr 30 22:17   still logged in
reboot   system boot  5.6.7-300.fc32.x Thu Apr 30 22:16   still running

useful logs

I also found this stackexchange answer with a lot of useful log files that have information related to reboots like Kernel messages, systemd-journal etc.

[Published in Open Source For You (OSFY) magazine, October 2017 edition.]

This article is the eighth in the DevOps series. In this issue, we shall learn to set up Docker in the host system and use it with Ansible.

坚果代理服务器

Docker provides operating system level virtualisation in the form of containers. These containers allow you to run standalone applications in an isolated environment. The three important features of Docker containers are isolation, portability and repeatability. All along we have used Parabola GNU/Linux-libre as the host system, and executed Ansible scripts on target Virtual Machines (VM) such as CentOS and Ubuntu.

Docker containers are extremely lightweight and fast to launch. You can also specify the amount of resources that you need such as CPU, memory and network. The Docker technology was launched in 2013, and released under the Apache 2.0 license. It is implemented using the Go programming language. A number of frameworks have been built on top of Docker for managing these cluster of servers. The Apache Mesos project, Google’s Kubernetes, and the Docker Swarm project are popular examples. These are ideal for running stateless applications and help you to easily scale them horizontally.

坚果代理服务器

The Ansible version used on the host system (Parabola GNU/Linux-libre x86_64) is 2.3.0.0. Internet access should be available on the host system. The ansible/ folder contains the following file:

ansible/playbooks/configuration/docker.yml

坚果代理服务器

电视连接wifi网怎么看电视连上Wifi怎么看网络电视 我的智能 ...:2021-6-14 · 7、进入向导之后，主要就是搜索无线路由器、输入密码，就可以连网收看网络节目了。 解决办法有以下6步： 1、将无线路由器连上网线，插上电源。将笔记本电脑的网孔和路由器的连接起来，可以设置无线路由器。2、输入路由器网址，用户名admin，密码

---
- name: Setup Docker
  hosts: localhost
  gather_facts: true
  become: true
  tags: [setup]

  tasks:
    - name: Update the software package repository
      pacman:
        update_cache: yes

    - name: Install dependencies
      package:
        name: "{{ item }}"
        state: latest
      with_items:
        - python2-docker
        - docker

    - service:
        name: docker
        state: started

    - name: Run the hello-world container
      docker_container:
        name: hello-world
        image: library/hello-world

The Parabola package repository is updated before proceeding to install the dependencies. The python2-docker package is required for use with Ansible. Hence, it is installed along with the docker package. The Docker daemon service is then started and the library/hello-world container is fetched and executed. A sample invocation and execution of the above playbook is shown below:

$ ansible-playbook playbooks/configuration/docker.yml -K --tags=setup
SUDO password: 

PLAY [Setup Docker] *************************************************************

TASK [Gathering Facts] **********************************************************
ok: [localhost]

TASK [Update the software package repository] ***********************************
changed: [localhost]

TASK [Install dependencies] *****************************************************
ok: [localhost] => (item=python2-docker)
ok: [localhost] => (item=docker)

TASK [service] ******************************************************************
ok: [localhost]

TASK [Run the hello-world container] ********************************************
changed: [localhost]

PLAY RECAP **********************************************************************
localhost                  : ok=5    changed=2    unreachable=0    failed=0   

With verbose ’-v’ option to ansible-playbook, you will see an entry for LogPath, such as /var/lib/docker/containers//-json.log. In this log file you will see the output of the execution of the hello-world container. This output is the same when you run the container manually as shown below:

$ sudo docker run hello-world

Hello from Docker!

This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 http://cloud.docker.com/

For more examples and ideas, visit:
 http://docs.docker.com/engine/userguide/

坚果代理服务器

A Deep Learning (DL) Docker project is available (http://github.com/floydhub/dl-docker) with support for frameworks, libraries and software tools. We can use Ansible to build the entire DL container from the source code of the tools. The base OS of the container is Ubuntu 14.04, and will include the following software packages:

• Tensorflow
• Caffe
• 怎么改变自己的外网ip
• Keras
• Lasagne
• Torch
• 怎么改变自己的外网ip
• Numpy
• SciPy
• Pandas
• Scikit Learn
• Matplotlib
• OpenCV

win7台式电脑右下角出现感叹号连不上网怎么回事啊？？ 我用 ...:√ win7台式电脑右下角出现感叹号连不上网怎么回事啊??_ ⊇ ⊇ ⊇ 如果您是指电脑宽带网络连接图标出现黄色叹号导致无法上网,一般是由于IP地址冲突导致,建议您可打开【网络共享中心】,选择【更改适配器设置】,右键本地连接属性,双击ipv4,选择自动获取ip,然后打开【运行】,输入CMD,在命令提示符下 ...

- name: Build the dl-docker image
  hosts: localhost
  gather_facts: true
  become: true
  tags: [deep-learning]

  vars:
    DL_BUILD_DIR: "/tmp/dl-docker"
    DL_DOCKER_NAME: "floydhub/dl-docker"

  tasks:
    - name: Download dl-docker
      git:
        repo: http://github.com/saiprashanths/dl-docker.git 
        dest: "{{ DL_BUILD_DIR }}"

    - name: Build image and with buildargs
      docker_image:
         path: "{{ DL_BUILD_DIR }}"
         name: "{{ DL_DOCKER_NAME }}"
         dockerfile: Dockerfile.cpu
         buildargs:
           tag: "{{ DL_DOCKER_NAME }}:cpu"

We first clone the Deep Learning docker project sources. The docker_image module in Ansible helps us to build, load and pull images. We then use the 怎么更换外网ip file to build a Docker image targeting the CPU. If you have a GPU in your system, you can use the Dockerfile.gpu file. The above playbook can be invoked using the following command:

$ ansible-playbook playbooks/configuration/docker.yml -K --tags=deep-learning

Depending on the CPU and RAM you have, it will take considerable amount of time to build the image with all the software. So be patient!

更改ip地址就可以连外网了

The built dl-docker image contains Jupyter notebook which can be launched when you start the container. An Ansible playbook for the same is provided below:

- name: Start Jupyter notebook
  hosts: localhost
  gather_facts: true
  become: true
  tags: [notebook]

  vars:
    DL_DOCKER_NAME: "floydhub/dl-docker"

  tasks:
    - name: Run container for Jupyter notebook
      docker_container:
        name: "dl-docker-notebook"
        image: "{{ DL_DOCKER_NAME }}:cpu"
        state: started
        command: sh run_jupyter.sh

You can invoke the playbook using the following command:

$ ansible-playbook playbooks/configuration/docker.yml -K --tags=notebook

The Dockerfile already exposes the port 8888, and hence you do not need to specify the same in the above docker_container configuration. After you run the playbook, using the ‘docker ps’ command on the host system, you can obtain the container ID as indicated below:

$ sudo docker ps
CONTAINER ID        IMAGE                    COMMAND               CREATED             STATUS              PORTS                NAMES
a876ad5af751        floydhub/dl-docker:cpu   "sh run_jupyter.sh"   11 minutes ago      Up 4 minutes        6006/tcp, 8888/tcp   dl-docker-notebook

You can now login to the running container using the following command:

$ sudo docker exec -it a876 /bin/bash

You can then run an ‘ifconfig’ command to find the local IP address (“172.17.0.2” in this case), and then open http://172.17.0.2:8888 in a browser on your host system to see the Jupyter Notebook. A screenshot is shown in Figure 1:

TensorBoard

TensorBoard consists of a suite of visualization tools to understand the TensorFlow programs. It is installed and available inside the Docker container. After you login to the Docker container, at the root prompt, you can start Tensorboard by passing it a log directory as shown below:

# tensorboard --logdir=./log

You can then open http://172.17.0.2:6006/ in a browser on your host system to see the Tensorboard dashboard as shown in Figure 2:

Docker Image Facts

The 怎么更换外网ip Ansible module provides useful information about a Docker image. We can use it to obtain the image facts for our dl-docker container as shown below:

- name: Get Docker image facts
  hosts: localhost
  gather_facts: true
  become: true
  tags: [facts]

  vars:
    DL_DOCKER_NAME: "floydhub/dl-docker"

  tasks:
    - name: Get image facts
      docker_image_facts:
        name: "{{ DL_DOCKER_NAME }}:cpu"

用手机流量上网有IP地址吗 手机上网IP地址怎么查 - 路由器 ...:2021-3-20 · 只要你用了网络系统就会留下你的IP，不管是电脑还是用手机，只要用了流量就会分配，电脑上差IP大家肯定都知道，这篇文章主要是向大家介绍如何查看手机IP地址，手机上网方式多多下面为大家介绍怎么设置手机IP地址把！

VMware虚拟机怎么加入主机的局域网？:你会发现在这种方式下,vmware自带的dhcp会默认地加载到vmnet8界面上,这样虚拟机就可以使用dhcp服务.更为重要的是,vmware自带了nat服务,提供了从vmnet8到外网的地址转 换,所以这种情况是一个实实在在的nat服务器在运行,只不过是供虚拟机用的.

The ANSIBLE_STDOUT_CALLBACK environment variable is set to ‘json’ to produce a JSON output for readability. Some important image facts from the invocation of the above playbook are shown below:

"Architecture": "amd64", 
"Author": "Sai Soundararaj <saip@outlook.com>", 

"Config": {

"Cmd": [
   "/bin/bash"
], 

"Env": [
   "PATH=/root/torch/install/bin:/root/caffe/build/tools:/root/caffe/python:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", 
   "CAFFE_ROOT=/root/caffe", 
   "PYCAFFE_ROOT=/root/caffe/python", 
   "PYTHONPATH=/root/caffe/python:", 
   "LUA_PATH=/root/.luarocks/share/lua/5.1/?.lua;/root/.luarocks/share/lua/5.1/?/init.lua;/root/torch/install/share/lua/5.1/?.lua;/root/torch/install/share/lua/5.1/?/init.lua;./?.lua;/root/torch/install/share/luajit-2.1.0-beta1/?.lua;/usr/local/share/lua/5.1/?.lua;/usr/local/share/lua/5.1/?/init.lua", 
   "LUA_CPATH=/root/torch/install/lib/?.so;/root/.luarocks/lib/lua/5.1/?.so;/root/torch/install/lib/lua/5.1/?.so;./?.so;/usr/local/lib/lua/5.1/?.so;/usr/local/lib/lua/5.1/loadall.so", 
   "LD_LIBRARY_PATH=/root/torch/install/lib:", 
   "DYLD_LIBRARY_PATH=/root/torch/install/lib:"
], 

"ExposedPorts": {
   "6006/tcp": {}, 
   "8888/tcp": {}
}, 

"Created": "2016-06-13T18:13:17.247218209Z", 
"DockerVersion": "1.11.1", 

"Os": "linux", 

"task": { "name": "Get image facts" }

You are encouraged to read the ‘Getting Started with Docker’ user guide available at 海康网络摄像机密码忘记了怎么办:2021-7-5 · 摄像头忘记密码怎么办 到官网上下载一个搜索ip工具，把电脑与摄像机（或摄像机所在的交换机上）用网线连在一起，用软件搜索一下，就可以找到所有的ip地址了。 原发布者:忧伤的蚂蚁牙黑 海康4500客户端连接及故障排除方法1、设置录像机或者摄像机DDNS，并输入域名用户名和密码2、打开手 … to know more about using Docker with Ansible.

This is an attempt to summarize the broader software architecture around dependency resolution in pip and how testing is being done around this area.

The motivation behind writing this, is to make sure all the developers working on this project are on the same page, and to have a written record about the state of affairs.

更改ip地址就可以连外网了

The “legacy” resolver in pip, is implemented as part of pip’s codebase and has been a part of it for many years. It’s very tightly coupled with the existing code, isn’t easy to work with and has severe backward compatibility concerns with modifying directly – which is why we’re implementing a separate “new” resolver in this project, instead of trying to improve the existing one.

The “new” resolver that is under development, is not implemented as part of pip’s codebase; not completely anyway. We’re using an abstraction that separates all the metadata-generation-and-handling stuff vs the core algorithm. This allows us to work on the core algorithm logic (i.e. the NP-hard search problem) separately from pip-specific logic (eg. download, building etc). The abstraction and core algorithm are written/maintained in http://github.com/sarugaku/resolvelib right now. The pip-specific logic for implementing the “other side” of the abstraction is in http://github.com/pypa/pip/tree/master/src/pip/_internal/resolution/resolvelib.

Testing

In terms of testing, we have dependency-resolution-related tests in both resolvelib and pip.

resolvelib

The tests in resolvelib are intended more as “check if the algorithm does things correctly” and even contains tests that are agnostic to the Python ecosystem (eg. we’ve borrowed tests from Ruby, Swift etc). The goal here is to make sure that the core algorithm we implement is capable of generating correct answers (for example: not getting stuck in looping on the same “requirement”, not revisiting rejected nodes etc).

怎么改变自己的外网ip

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YAML-based tests

We have “YAML” tests which I’d written back in 2017, as a format to easily write tests for pip’s new resolver when we implement it. However, since we didn’t have a need for it to be working completely back then (there wasn’t a new resolver to test with it!), the “harness” for running these tests isn’t complete and would likely need some work to be as feature complete as we’d want it to be, for writing good tests.

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YAML test “harness”: http://github.com/pypa/pip/blob/master/tests/functional/test_yaml.py and http://github.com/pypa/pip/blob/master/tests/lib/yaml_helpers.py

“new” resolver tests

更改ip地址就可以连外网了

We have some unit tests for the new resolver implementation. These cover very basic “sanity checks” to ensure it follows the “contract” of the abstraction, like “do the candidates returned by a requirement actually satisfy that requirement?”. These likely don’t need to be touched, since they’re fairly well scoped and test fairly low-level details (i.e. ideal for unit tests).

New resolver unit tests: http://github.com/pypa/pip/tree/master/tests/unit/resolution_resolvelib

functional tests

We also have “new resolver functional tests”, which are written as part of the current work. These exist since how-to-work-with-YAML-tests was not an easy question to answer and there needs to be work done (both on the YAML format, as well as the YAML test harness) to flag which tests should run with which resolver (both, only legacy, only new) and make it possible to put run these tests in CI easily.

New resolver functional tests: http://github.com/pypa/pip/blob/master/tests/functional/test_new_resolver.py

test_install*.py

These files test all the functionality of the install command (like: does it use the right build dependencies, does it download the correct files, does it write the correct metadata etc). There might be some dependency-resolution-related tests in test_install*.py files.

These files contain a lot of tests so, ideally, at some point, someone would go through and de-duplicate tests from this as well.

How can you help?

If you use pip, there are a multiple ways that you can help us!

• First and most fundamentally, please help us understand how you use pip by talking with our user experience researchers. You can do this right now! You can take a survey, or have a researcher interview you over a video call. Please sign up and spread the word to anyone who uses pip (even a little bit).

• Right now, even before we release the new resolver as a beta, you can help by running pip check on your current environment. This will report if you have any inconsistencies in your set of installed packages. Having a clean installation will make it much less likely that you will hit issues when the new resolver is released (and may address hidden problems in your current environment!). If you run pip check and run into stuff you can’t figure out, please ask for help in our issue tracker or chat.

Thanks to Paul Moore and Tzu-Ping for help in reviewing and writing this post, as well as Sumana Harihareswara for suggesting to put this up on my blog!

I’m trying to post these roughly once a month. Here’s the January post.

I am working on open source projects, as part of an internship at FOSSEE and as a part of grant-funded work on pip’s dependency resolver.

Work I did (Jan 6 - Feb 5)

更改ip地址就可以连外网了

• Co-worked with another developer, in person, for 1 week, on pip!
• Triaged pip’s issue tracker (a lot).
• Spend some time improving pip’s test suite infrastructure.
• Investigated Python 2 usage, to identify anomalies.
• Helped with virtualenv 20.0 release (kinda!).
• Invested effort to improve pip’s test suite
• Helped aggregate test cases for pip’s next generation resolver.

怎么更换外网ip

• Managed the pip 20.0 release fiasco.
• Helped the UX folks get started with working on pip.

怎么改变自己的外网ip

如何查看自己使用网络的外网IP地址？_酷知经验网:2021-10-27 · 如何查看自己使用网络的外网IP地址？下面小编来教大家。 现在很多信息平台网上的报名资料、招聘网站附件都仅支持PDF格式的文件上传，那么如果我们手中要上传的附件是word文件格式的，该怎么上传上去呢？

Most of the challenges have been the logistics around work, not the work as such.

My health has been pretty good and there’s a certain flow to my work that I’m enjoying now. Turns out, if you like what you’re doing, you tend to be pretty productive! :)

争取用这一篇文章帮你搞定NS连网和联机问题 - 知乎:[更新中]不管使用哪种联网设备，电脑、电视还是游戏机，都要知道自己所在的网络如何，不然连有效的向别人求助都做不到。 另外，新NS要先有本地用户，创建本地用户的方法在这里（视频教学），没有帐号的 …

Goals for February 2020

Technical

• Internal Cleansing: AKA Technical debt down payment.
• Issue triage: Triage a fair number of issues on pip’s issue tracker.
• Technical Documentation: improving pip’s technical documentation, for contributors and developers

Communication

• Help all the other contractors to get up to “full speed” for working on pip
• Get PyPA to participate in GSoC 2020
• Python Packaging Summit at PyCon US 2020: help organization.
• Move forward on Python Packaging Governance

Other commitments

None.

Help us

How can you help us?

• provide test cases where the latest released version of pip (19.3.1, at the time of writing) fails to resolve dependencies properly (on zazo’s issue tracker). They will help us design and test the new resolver.
• talk with your company about becoming a PSF sponsor. The Fundable Packaging Improvements page lists fairly well-scoped projects that would happen much faster if we get funding to achieve them.
• Have an interview with our UX expert, who is working to improve usability of Python Packaging tooling.

[NOTE: This post originally appeared on deepsource.io, and has been posted here with due permission.]

In the early part of the last century, when David Hilbert was working on stricter formalization of geometry than Euclid, Georg Cantor had worked out a theory of different types of infinities, the theory of sets. This theory would soon unveil a series of confusing paradoxes, leading to a crisis in the Mathematics community  regarding the stability of the foundational principles of the math of that time.

Central to these paradoxes was the 怎么更换外网ip (or more generally, as we’d talk about later, the Epimenides Paradox). Let’s see what it is.

In those simpler times, you were allowed to define a set if you could describe it in English. And, owing to mathematicians’ predilection for self-reference, sets could contain other sets.

Russell then, came up with this:

\(R\)  is a set of all the sets which do not contain themselves.

The question was "Does \(R \) contain itself?" If it doesn’t, then according to the second half of the definition it should. But if it does, then it no longer meets the definition.

The same can symbolically be represented as:

Let \(R = \{ x \mid x \not \in x \} \), then \(R \in R \iff R \not \in R \)

Cue mind exploding.

“Grelling’s paradox” is a startling variant which uses adjectives instead of sets. If adjectives are divided into two classes, autological (self-descriptive) and heterological (non-self-descriptive), then, is ‘heterological’ heterological? Try it!

Epimenides Paradox

Or, the so-called Liar Paradox was another such paradox which shred apart whatever concept of ‘computability’ was, at that time - the notion that things could either be true or false.

Epimenides was a Cretan, who made one immortal statement:

“All Cretans are liars.”

If all Cretans are liars, and Epimenides was a Cretan, then he was lying when he said that “All Cretans are liars”. But wait, if he was lying then, how can we ‘prove’ that he wasn’t lying about lying? Ein?

⊕

This is what makes it a paradox: A statement so rudely violating the assumed dichotomy of statements into true and false, because if you tentatively think it’s true, it backfires on you and make you think that it is false. And a similar backfire occurs if you assume that the statement is false. Go ahead, try it!

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Strange Loopiness

If self-reference, or what Douglas Hofstadter - whose prolific work on the subject matter has inspired this blog post - calls ‘Strange Loopiness’ was the source of all these paradoxes, it made perfect sense to just banish self-reference, or anything which allowed it to occur. Russell and Whitehead, two rebel mathematicians of the time, who subscribed to this point of view, set forward and undertook the mammoth exercise, namely 怎么更改手机外网ip, which we as we will see in a little while, was utterly demolished by Gödel’s findings.

The main thing which made it difficult to ban self-reference was that it was hard to pin point where exactly did the self-reference occur. It may as well be spread out over several steps, as in this ‘expanded’ version of Epimenides:

The next statement is a lie.

The previous statement is true.

Russell and Whitehead, in 怎么更改手机外网ip then, came up with a multi-hierarchy set theory to deal with this. The basic idea was that a set of the lowest ‘type’ could only contain ‘objects’ as members (not sets). A set of the next type could then only either contain objects, or sets of lower types. This, implicitly banished self-reference.

Since, all sets must have a type, a set ‘which contains all sets which are not members of themselves’ is not a set at all, and thus you can say that Russell’s paradox was dealt with.

Similarly, if an attempt is made towards applying the expanded Epimenides to this theory, it must fail as well, for the first sentence to make a reference to the second one, it has to be hierarchically above it - in which case, the second one can’t loop back to the first one.

Thirty one years after David Hilbert set before the academia to rigorously demonstrate that the system defined in Principia Mathematica was both consistent (contradiction-free) and complete (i.e. every true statement could be evaluated to true within the methods provided by P.M.), Gödel published his famous Incompleteness Theorem. By importing the Epimenides Paradox right into the heart of P.M., he proved that not just the axiomatic system developed by Russell and Whitehead, but none of the axiomatic systems whatsoever were complete without being inconsistent.

Clear enough, 怎么改变自己的外网ip lost it’s charm in the realm of academics.

Before Gödel’s work too, P.M. wasn’t particularly loved as well.

Why?

It isn’t just limited to this blog post, but we humans, in general, have a diet for self-reference - and this quirky theory severely limits our ability to abstract away details - something which we love, not only as programmers, but as linguists too - so much so, that the preceding paragraph, “It isn’t … this blog … we humans …” would be doubly forbidden because the ‘right’ to mention ‘this blog post’ is limited only to something which is hierarchically above blog posts, ‘metablog-posts’. Secondly, me (presumably a human) belonging to the class ‘we’ can’t mention ‘we’ either.

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One way of making such a strange loop, and perhaps the ‘simplest’ is using the word ‘this’. Here:

• This sentence is made up of eight words.
• 海康网络摄像机密码忘记了怎么办:2021-7-5 · 摄像头忘记密码怎么办 到官网上下载一个搜索ip工具，把电脑与摄像机（或摄像机所在的交换机上）用网线连在一起，用软件搜索一下，就可以找到所有的ip地址了。 原发布者:忧伤的蚂蚁牙黑 海康4500客户端连接及故障排除方法1、设置录像机或者摄像机DDNS，并输入域名用户名和密码2、打开手 …
• 更改ip地址就可以连外网了
• This sentence conveys you the meaning of ‘this’.
• 【nat 虚拟机linux联网】-博文推荐-CSDN博客:2021-3-18 · csdn已为您找到关于nat 虚拟机linux联网相关内容，包含nat 虚拟机linux联网相关文档代码介绍、相关教学视频课程，以及相关nat 虚拟机linux联网问答内容。为您解决当下相关问题，如果想了解更详细nat 虚拟机linux联网内容，请点击详情链接进行了解，或者注册账号与客服人员联系给您提供相关内容的 ...

Another amusing trick for creating a self-reference without using the word ‘this sentence’ is to quote the sentence inside itself.

Someone may come up with:

The sentence ‘The sentence contains five words’ contains five words.

家里想装两个Wi-Fi，但是接了一个，另一个就会没有信号，就 ...:设置“IP地址”为刚刚设置的DHCP范围内的IP地址，如192.168.0.1。因为如果与DHCP分别的地址不同网段，以后登录路由器时，就会需要将电脑的IP手动改成静态且网关设为路由器IP才能登录到路由器的后台。6、完成设置后，就需要重启路由器。

The sentence
    "The sentence
        "The sentence
                                ...etc
                                ...etc
        is infinitely long"
    is infinitely long"
is infinitely long"

There’s a third method as well, which you already saw in the title - the Quine method. The term ‘Quine’ was coined by Douglas Hofstadter in his book “Gödel Escher, Bach” (which heavily inspires this blog post). When using this, the self-reference is ‘generated’ by describing a typographical entity, isomorphic to the quine sentence itself. This description is carried in two parts - one is a set of ‘instructions’ about how to ‘build’ the sentence, and the other, the ‘template’ contains information about the construction materials required.

The Quine version of Epimenides would be:

“yields falsehood when preceded by it’s quotation” yields falsehood when preceded by it’s quotation

Before going on with ‘quining’, let’s take a moment and realize how awfully powerful our cognitive capacities are, and what goes in our head when a cognitive payload full of self-references is delivered - in order to decipher it, we not only need to know the language, but also need to work out the referent of the phrase analogous to ‘this sentence’ in that language. This parsing depends on our complex, yet totally assimilated ability to handle the language.

The idea of referring to itself is quite mind-blowing, and we keep doing it all the time — perhaps, why it feels so ‘easy’ for us to do so. But, we aren’t born that way, we grow that way. This could better be realized by telling someone much younger “This sentence is wrong.”. They’d probably be confused - What sentence is wrong?. The reason why it’s so simple for self-reference to occur, and hence allow paradoxes, in our language, is well, our language. It allows our brain to do the heavy lifting of what the author is trying to get through us, without being verbose.

Back to Quines.

怎么更换外网ip

Now, that we are aware of how ‘quines’ can manifest as self-reference, it would be interesting to see how the same technique can be used by a computer program to ‘reproduce’ itself.

To make it further interesting, we shall choose the language most apt for the purpose - brainfuck:

>>>>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>++++++++[->++++++++<]>--....[-]<<[<]<<++++++++[->+++++>++++++++<<]>+++>-->[[-<<<+>.>>]<.[->+<]<[->+<]>>>]<<<<[<]>[.>]

Running that program above produces itself as the output. I agree, it isn’t the most descriptive program in the world, so written in Python below, is the nearest we can go to describe what’s happening inside those horrible chains of +’s and >’s:

THREE_QUOTES = '"' * 3

def eniuq(template): 怎么更改手机外网ip(
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eniuq("""THREE_QUOTES = '"' * 3

def eniuq(template): print(
  f'{template}({THREE_QUOTES}{template}{THREE_QUOTES})')

eniuq""")

The first line generates """ on the fly, which marks multiline strings in Python.

Next two lines define the eniuq function, which prints the argument template twice - once, plain and then surrounded with triple quotes.

The last 4 lines cleverly call this function so that the output of the program is the source code itself.

Since we are printing in an order opposite of quining, the name of the function is ‘quine’ reversed -> 怎么更换外网ip (name stolen from Hofstadter again)

Remember the discussion about how self-reference capitalizes on the processor? What if ‘quining’ was a built-in feature of the language, providing what we in programmer lingo call ‘syntactic sugar’?

Let’s assume that an asterisk, * in the brainfuck interpreter would copy the instructions before executing them, what would then be the output of the following program?

*

It’d be an asterisk again. You could make an argument that this is silly, and should be counted as ‘cheating’. But, it’s the same as relying on the processor, like using “this sentence” to refer to this sentence - you rely on your brain to do the inference for you.

What if eniuq was a builtin keyword in Python? A perfect self-rep was then just be a call away:

eniuq('eniuq')

What if quine was a verb in the English language? We could reduce a lot of explicit cognitive processes required for inference. The Epimenides paradox would then be:

“yields falsehood if quined” yields falsehood if quined

Now, that we are talking about self-rep, here’s one last piece of entertainment for you.

ip地址开头255是_zuciwang.com:1999-12-31 · IP地址由四组三位数据和点组成的，每个 San 位数字值必须在0~255之间，也就还0.0.0.0~255.255.255.255 Zhi 间，只要IP必须在这个IP段里，但是255.255.255.255 Shi 广播地址一般是不使用的，另外有些地址是 Bu 使用的例如192.168.1.1这样的 Yi 般为路由

This formula is defined through an inequality:

\({1 \over 2} < \left\lfloor \mathrm{mod}\left(\left\lfloor {y \over 17} \right\rfloor 2^{-17 \lfloor x \rfloor - \mathrm{mod}(\lfloor y\rfloor, 17)},2\right)\right\rfloor\)

If you take that absurd thing above, and move around in the cartesian plane for the coordinates \(0 \le x \le 106, k \le y \le k + 17\), where \(k\) is a 544 digit integer (just hold on with me here), color every pixel black for True, and white otherwise, you'd get:

This doesn't end here. If \(k\) is now replaced with another integer containing 291 digits, we get yours truly:

The Tex User Group 2019 conference was held between August 9-11, 2019 at Sheraton Palo Alto Hotel, in Palo Alto, California.

I wanted to attend TUG 2019 for two main reasons - to present my work on the “XeTeX Book Template”, and also to meet my favourite computer scientist, Prof. Donald Knuth. He does not travel much, so, it was one of those rare opportunities for me to meet him in person. His creation of the TeX computer typesetting system, where you can represent any character mathematically, and also be able to program and transform it is beautiful, powerful and the best typesetting software in the world. I have been using TeX extensively for my documentation and presentations over the years.

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I reached the hotel venue only in the afternoon of Friday, August 9, 2019, as I was also visiting Mountain View/San Jose on official work. I quickly checked into the hotel and completed my conference registration formalities. When I entered the hall, Rishi T from STM Document Engineering Private Limited, Thiruvananthapuram was presenting a talk on “Neptune - a proofing framework for LaTeX authors”. His talk was followed by an excellent poetic narration by Pavneet Arora, who happened to be a Vim user, but, also mentioned that he was eager to listen to my talk on XeTeX and GNU Emacs.

After a short break, Shreevatsa R, shared his experiences on trying to understand the TeX source code, and the lessons learnt in the process. It was a very informative, user experience report on the challenges he faced in navigating and learning the TeX code. Petr Sojka, from Masaryk University, Czech Republic, shared his students’ experience in using TeX with a detailed field report. I then proceeded to give my talk on the “XeTeX Book Template” on creating multi-lingual books using GNU Emacs and XeTeX. It was well received by the audience. The final talk of the day was by Jim Hefferon, who analysed different LaTeX group questions from newbies and in StackExchange, and gave a wonderful summary of what newbies want. He is a professor of Mathematics at Saint Michael’s College, and is well-known for his book on Linear Algebra, prepared using LaTeX. It was good to meet him, as he is also a Free Software contributor.

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The second day of the conference began with Petr Sojka and Ondřej Sojka presenting on “The unreasonable effectiveness of pattern generation”. They discussed the Czech hyphenation patterns along with a pattern generation case study. This talk was followed by Arthur Reutenauer presenting on “Hyphenation patterns in TeX Live and beyond”. David Fuchs, a student who worked with Prof. Donald Knuth on the TeX project in 1978, then presented on “What six orders of magnitude of space-time buys you”, where he discussed the design trade-offs in TeX implementation between olden days and present day hardware.

After a short break, 怎么更换外网ip, who was also a student at Stanford and worked with Donald Knuth on TeX, gave an excellent presentation on searching and copying text in PDF documents generated by TeX for Type-3 bitmap fonts. This session was followed by Martin Ruckert’s talk on “The design of the HINT file format”, which is intended as a replacement of the DVI or PDF file format for on-screen reading of TeX output. He has also authored a book on the subject - “HINT: The File Format: Reflowable Output for TeX”. Doug McKenna had implemented an interactive iOS math book with his own TeX interpreter library. This allows you to dynamically interact with the typeset document in a PDF-free ebook format, and also export the same. We then took a group photo:

I then had to go to Stanford, so missed the post-lunch sessions, but, returned for the banquet dinner in the evening. I was able to meet and talk with Prof. Donald E. Knuth in person. Here is a memorable photo!

He was given a few gifts at the dinner, and he stood up and thanked everyone and said that “He stood on the shoulders of giants like Isaac Newton and Albert Einstein.”

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I had a chance to meet a number of other people who valued the beauty, precision and usefulness of TeX. Douglas Johnson had come to the conference from Savannah, Georgia and is involved in the publishing industry. Rohit Khare, from Google, who is active in the Representational State Transfer (ReST) community shared his experiences with typesetting. Nathaniel Stemen is a software developer at Overleaf, which is used by a number of university students as an online, collaborative LaTeX editor. Joseph Weening, who was also once a student to Prof. Donald Knuth, and is at present a Research Staff member at the Institute for Defense Analyses Center for Communications Research in La Jolla, California (IDA/CCR-L) shared his experiences in working with the TeX project.

坚果代理服务器

The final day of the event began with 怎么改变自己的外网ip talking on “A glance at CJK support with XeTeX and LuaTeX”. He is an Associate Professor of the Ubuntu虚拟机下连入主机网及实现shadowsocks翻墙（NAT ...:3.cmd查看主机的IP地址 开始->搜索程序和文件->输入cmd->弹出cmd的黑窗->输入ipconfig->获取主机的ip地址 前两步和上面的一样，图片免去 这里会显示很多适配器的ip地址，只要找到你主机连得上网的那个适配器所对应的ip地址就可以了： 像我这里适配器连得, Japan. He has been conducting research regarding Japanese characters and their memorisation. This session was followed by a talk by Jaeyoung Choi on “FreeType MF Module 2: Integration of Metafont and TeX-oriented bitmap fonts inside FreeType”. Jennifer Claudio then presented the challenges in improving Hangul to English translation.

After a short break, Rishi T presented “TeXFolio - a framework to typeset XML documents using TeX”. Boris Veytsman then presented the findings on research done at the College of Information and Computer Science, University of Massachusetts, Amherst on “BibTeX-based dataset generation for training citation parsers”. The last talk before lunch was by Didier Verna on “Quickref: A stress test for Texinfo”. He teaches at École Pour l’Informatique et les Techniques Avancées, and is a maintainer of XEmacs, Gnus and BBDB. He also an avid Lisper and one of the organizers of the European Lisp Symposium!

After lunch, Uwe Ziegenhagen demonstrated on using LaTeX to prepare and automate exams. This was followed by a field report by Yusuke Terada, on how they use TeX to develop a digital exam grading system at large scale in Japan. Chris Rowley, from the LaTeX project, then spoke on “Accessibility in the LaTeX kernel - experiments in tagged PDF”. Ross Moore joined remotely for the final session of the day to present on “LaTeX 508 - creating accessible PDFs”. The videos of both of these last two talks are available online.

A number of TeX books were made available for free for the participants, and I grabbed quite a few, including a LaTeX manual written by Leslie Lamport. Overall, it was a wonderful event, and it was nice to meet so many like-minded Free Software people.

A special thanks to Karl Berry, who put in a lot of effort in organizing the conference, but, could not make it to due to a car accident.

The TeX User Group Conference in 2020 is scheduled to be held at my alma mater, Rochester Institute of Technology.

Happy Birthday Dear me!

I was still up at this unearthly hour, thinking about life for a while now - fumbled thoughts about where I had come, where I started, and quite expectedly, Omar Bhai, your name popped in.

The stream continued. I started thinking about everything I’ve learned from you and was surprised with merely the sheer volume of thoughts that followed. I felt nostalgic!

I made a mental note to type this out the next day.

手机连不上Wi-Fi 咋修改MAC地址？-变极ip修改器:2021-3-23 · MAC地址同IP地址的区别就在于，虽然他们在局域网中是一一对应的关系，不过IP地址是跟据现在的IPv4(还有IPv6)标准指定的，不受硬件限制比较容易记忆的地址，而Mac地址却是用网卡的物理地址，多少与硬件有关系，比较难于记忆。为何要修改手机MAC地址

For those of you who don’t already know him, here’s a picture:

I’m a little emotional right now, so please bear with me.

You have been warned - the words “thank you” and “thanks” appear irritatingly often below. I tried changing, but none other has quite the same essence.

How do I begin thanking you?

Well, let’s start with this - thank you for kicking me on my behind, albeit civilly, whenever I would speak nuisance (read chauvinism). I can’t thank you enough for that!

I still can’t quite get how you tolerated the bigot I was and managed to be calm and polite. Thank You for teaching me what tolerance is!

Another thing which I learnt from you was what it meant to be privileged. I can no longer see things the way I used to, and this has made a huge difference. Thank You!

I saw you through your bad times and your good. The way you tackled problems, and how easy you made it look. Well, it taught me [drum roll] how to think (before acting and not the other way round). Thank You for that too!

And, thank you for buying me books, and even more so, lending away so many of them! and even more so, educating me about why to read books and how to read them. I love your collection.

You showed all of us, young folks, how powerful effective communication is. Thank You again for that! I know, you never agree on this, but you are one hell of a speaker. I’ve always been a fan of you and your puns.

I wasn’t preparing for the GRE, but I sat in your sessions anyways, just to see you speak. The way you connect with the audience is just brilliant.

For all the advice you gave me on my relationships with people - telling me to back off when I was being toxic and dragging me off when I was on the receiving side - I owe you big time. Thank You!

Also, a hearty thank you for making me taste the best thing ever - yes, fried cheese it is. :D

Thank You for putting your trust and confidence in me!

我在服务器上用IIS发布了一个Web Service，但是外网访问不 ...:2021-10-22 · 需要有公网IP才行，如果没有公网IP的话可以使用开源的holer，配置一个key就可以实现从外网访问服务器上的Web Service了 0 2021-10-22 14:57:09 只看TA 引用 举报 #10 得分 0

Yours Truly, Rahul

September 11, 2019

使用 VirtualBox6 挂载 CentOS8，连网连无线网WIFI办法 ...:2021-6-14 · 目录一、设置 VirtualBox 网络配置二、设置 linux 的网络配置三、检查网络连接情况各位帅哥美男、气质码农、精神小伙来的都是客，咱得用最好的，实践过的办法招待大家咱出解决方案不糊弄，都是楼主亲测过的办法，图片为现做现截的，保证新鲜度闲话少叙，开整一、设置 VirtualBox 网络配 …

The reason is nothing big but mainly because:

1. Apparently, I was not able to finish some tasks in time that I used to write about.
2. I was not well for a long time that could be an another reason .
3. Besides, life happened in many ways which ultimately left me working on some other things first, because they seemed to be *important* for the time.

台式电脑连不上网，只要自动获取IP就可以使用，但是由于IP ...:19 小时前 · 例：自动分配的是192.168.1.102 你手动设置时IP改为： 192.168.1.31 其他的什么子网掩码按DHCP的设置。 然后再高级里添加，增加你原来设置的IP。 或是在路由里配置DHCP的静态IP，指定这台电脑的MAC地址固定分配192.168.1.102，然后你手动设置DHCP时给你的IP，子网掩码，网关，DNS等信息，再在高级里添加你原来 ...

Though I had worked on many things throughout the time and I’ll try to write them here as short and quick logs below.

• Around the second last week of august, I worked on setting up a self-hosted OpenVPN server which supported client scalability. The infrastructure required two servers/VMs, each having a basic firewall setup and a non-root “sudo” priviliged user. One among them was to host the OpenVPN service and another one was to serve as a Certificate Authority (CA). You can refer the following links to check for the related process.
  • How To Set Up an OpenVPN Server on Ubuntu 18.04
  • Easy Way to Install and Configure OpenVPN Server on Ubuntu 18.04 / Ubuntu 16.04
  • How to use nmcli to connect to OpenVPN Server on Linux

• In the last week of August, I worked on another task i.e to read about Syslogs and figure out how each of the systems can email the root mails to a certain email address for log collection. Thus, I read about Syslogs, how it works, its format and various Syslogs message levels. The latter part of the task was accomplished using ssmtp as mail program & writing cron jobs to actually send them to the intended email addresses. Check the following links for resources.
  • Syslog Tutorial: How It Works, Examples, Best Practices, and More
  • How to Send Email via SMTP Server from Linux Command Line (with SSMTP)
  • Setup cron job to send email to a bunch of people on a regular basis

This one question always came up, many times, the students managed to destroy their systems by doing random things. rm -rf台式电脑连不上网，只要自动获取IP就可以使用，但是由于IP ...:19 小时前 · 例：自动分配的是192.168.1.102 你手动设置时IP改为： 192.168.1.31 其他的什么子网掩码按DHCP的设置。 然后再高级里添加，增加你原来设置的IP。 或是在路由里配置DHCP的静态IP，指定这台电脑的MAC地址固定分配192.168.1.102，然后你手动设置DHCP时给你的IP，子网掩码，网关，DNS等信息，再在高级里添加你原来 ...

Kushal Das

• While I was doing the above task, at one time I ruined my local system’s mail server configs and actually ended up doing something which kushal writes about in one of his recent post (quoted above). I was using the command rm -rf to clean some of the left-over dependencies of some mail packages, but that eventually resulted into machine being crashed. It was not the end of the mess this time. I made an another extremely big mistake meanwhile. I was trying to back up the crashed system, into an external hard disk using dd. But because I had never used dd before, so again I did something wrong and this time, I ended up losing ~500 GBs of backed up data. This is “the biggest mistake” and “the biggest lesson” I have learnt so far. (now I know why one should have multiple backups) And as there was absolutely no way of getting that much data back, the last thing I did was, formatting the hard-disk into 2 partitions, one with ext4 file system for linux backup and the other one as ntfs for everything else.

Thank you so much jasonbraganza for all the help and extremely useful suggestions during the time.

• Okay, now after all the hassle bustle above, I got something really nice. This time, I received the “Raspberry Pi 4, 4GB, Complete Kit ” from kushal.

Thank you very much kushal for the RPi and an another huge thanks for providing me with all the guidance and support that made me reach to even what I am today.

• During the same time, I attended a dgplug guest session from utkarsh2102. This session gave me a “really” good beginner’s insight of how things actually work in 更改ip地址就可以连外网了. I owe a big thanks to utkarsh2102 as well, for he so nicely voluteered me from there onwards, to actually start with Debian project. I have started with DPMT and have done packaging 4 python modules so far. And now, I am looking forward to start contributing to Debian Ruby Team as well.

• With the start of september, I spent some time solving some basic Python problems from kushal’s lymworkbook. Those issues were related to some really simply sys-admins work. But for me, working around and wrapping them in Python was a whole lot of learning. I hope I will continue to solve some more problems/issues from the lab.

• And lastly (and currently), I am back to reading and implementing concepts from Ops School curriculum.

Voila, finally, I finish compiling up the logs from some last 20 days of work and other stuffs. (and thus, I am eventually finishing my long pending task of writing this post here as well).

I will definitely try to be more consistent with my writing from now onwards.

That’s all for now. o/

In my last blog, I quoted

I'm an advocate of using SSH authentication and connecting to services like Github, Gitlab, and many others.

On this, I received a bunch of messages over IRC asking why do I prefer SSH for Git over HTTPS.

I find the Github documentation quite helpful when it comes down to learning the basic operation of using Git and Github. So, what has Github to say about "SSH v/s HTTPS"?

Github earlier used to recommend using SSH, but they later changed it to HTTPS. The reason for the Github's current recommendation could be:

• Ease to start with: HTTPS is very easy to start with, as you don't have to set up your SSH keys separately. Once the account is created, you can just go over and start working with repositories. Though, the first issue that you hit is that you need to enter your username/password for every operation that you need to perform with git. This can be overcome by caching or storing the password using Git's credential storage. If you cache, then it is cached in memory for a limited period after which it is flushed so you need to enter your credentials again. I would not advise storing the password, as it is stored as plain-text on disk.
• Easily accessible: HTTPS in comparison to SSH is easily accessible. Why? You may ask. The reason is a lot of times SSH ports are blocked behind a firewall and the only option left for you might be HTTPS. This is a very common scenario I've seen in the Indian colleges and a few IT companies.

怎么改变自己的外网ip

SSH keys provide Github with a way to trust a computer. For every machine that I have, I maintain a separate set of keys. I upload the public keys to Github or whichever Git-forge I'm using. I also maintain a separate set of keys for the websites. So, for example, if I have 2 machines and I use Github and Pagure then I end up maintaining 4 keys. This is like a 1-to-1 connection of the website and the machine.

SSH is secure until you end up losing your private key. If you do end up losing your key, even then you can just login using your username/password and delete the particular key from Github. I agree, that the attacker can do nasty things but that would be limited to repositories and you would have control of your account to quickly mitigate the problem.

On the other side, if you end up losing your Github username/password to an attacker, you lose everything.

I also once benefitted from using SSH with Github, but IMO, exposing that also exposes a vulnerability so I'll just keep it a secret :)

Also, if you are on a network that has SSH blocked, you can always tunnel it over HTTPS.

But, above all, do use 2-factor authentication that Github provides. It's an extra layer of security to your account.

If you have other thoughts on the topic, do let me know over twitter @yudocaa, or drop me an email.

Photo by Christian Wiediger on Unsplash

I'm an advocate of using SSH authentication and connecting to services like Github, Gitlab, and many others. I do make sure that the use the 更改ip地址就可以连外网了 URL while cloning the repo but sometimes I do make mistake of using the http:// instead. Only to later realise when git prompts me to enter my username to authenticate the SSH connection. This is when I have to manually reset my git remote URL.

Today, I found a cleaner solution to this problem. I can use insteadOf to enforce the connection via SSH.

git config --global url."git@github.com:".insteadOf "http://github.com/"

This creates an entry in your .gitconfig:

[url "git@github.com:"]
	insteadOf = http://github.com/

Photo by Yancy Min on Unsplash

This blog is more like a bookmark for me, the solution was scavenged from internet. Recently I have been working on an analytics project where I had to generate pivot transpose tables from the data. Now this is the first time I faced the limitations set on postgres database. Since its a pivot, one of my column would be transposed and used as column names here, this is where things started breaking. Writing to postgres failed with error stating column names are not unique. After some digging I realized Postgres has a column name limitation of 63 bytes and anything more than that will be truncated hence post truncate multiple keys became the same causing this issue.

Next step was to look at the data in my column, it ranged from 20-300 characters long. I checked with redshift and Bigquery they had similar limitations too, 128 bytes. After looking for sometime found a solution, downloaded the postgres source, changed NAMEDATALEN to 301(remember column name length is always NAMEDATALEN – 1) src/include/pg_config_manual.h, followed the steps from 怎么更改手机外网ip to compile the source and install and run postgres. This has been tested on Postgres 9.6 as of now and it works.

Next up I faced issues with maximum number columns, my pivot table had 1968 columns and postgres has a limitation of 1600 total columns. According to this answer I looked into the source comments and that looked quite overwhelming . Also I do not have a control over how many columns will be there post pivot so no matter whatever value i set , in future i might need more columns, so instead I handled the scenario in my application code to split the data across multiple tables and store them.

References:

1. http://til.hashrocket.com/posts/8f87c65a0a-postgresqls-max-identifier-length-is-63-bytes
2. http://stackoverflow.com/questions/6307317/how-to-change-postgres-table-field-name-limit
3. http://www.postgresql.org/docs/9.6/install-short.html
4. http://dba.stackexchange.com/questions/40137/in-postgresql-is-it-possible-to-change-the-maximum-number-of-columns-a-table-ca