Download Free Pdf Beginners Python Cheat sheet for all Programmers 2021
When someone is trying out a set of exercises on a specific topic, or working on a project, cheatsheet can be really helpful. So programmer can fit so much information on just one sheet of paper, most fraudulent sheets are just a simple list of grammatical rules.
Vimdiff cheat sheet. ##git mergetool. In the middle file (future merged file), you can navigate between conflicts with c and c. Choose which version you want to keep with:diffget //2 or:diffget //3 (the //2 and //3 are unique identifiers for the target/master copy and the merge/branch copy file names). Download Free Pdf Beginners Python Cheat sheet for all Programmers. When someone is trying out a set of exercises on a specific topic, or working on a project, cheatsheet can be really helpful. So programmer can fit so much information on just one sheet of paper, most fraudulent sheets are just a simple list of grammatical rules. Python Cheat Sheet Mosh Hamedani Code with Mosh (codewithmosh.com) 1st Edition. About this Cheat Sheet. About this Cheat Sheet. If you’re serious about learning Python and getting a job as a Python developer, I highly encourage you to enroll in my Complete Python Course.
The purpose of this set of deception sheets is to remind you of grammatical rules, but also to remind you of important concepts.
In this Pdf Book we have some important python cheat sheets topics
§SSH / Mosh
More SSH awesomeness on https://github.com/moul/awesome-ssh
§SSH or mosh into a host and attach or create a named tmux session
and with mosh
replaces SERVER
with your SSH target hostname.
§Unsafe SSH or Mosh connection (temporary servers: CI)
with Mosh:
§Non-interactive SSH with password
§Networking
§Measure network performances and stability with iperf
Install:
- Install on mac with
brew install iperf
- Install on Linux with
sudo apt install iperf
TCP test:
- Run on the server:
iperf -s -p 6666
- Run on the client:
iperf -c ${SERVER} -p 6666
UDP test:
- Run on the server:
iperf -s -p 6666 -u
- Run on the client:
iperf -c ${SERVER} -p 6666 -u -b 900m
§traceroute & ping with mytraceroute (mtr)
- Install on Linux:
sudo apt install mtr
- Usage:
mtr ${IP}
Example:
§Find big files & Cleanup space
§Get aggregated sizes of sub-dirs and files
§Find big files
§Cleanup docker
§Git / GitHub
§Git / GitHub essential tools
- Install “hub” (https://hub.github.com/)
- Install “refined GitHub” browser extension (https://github.com/sindresorhus/refined-github)
§Do rebase instead of merge when pulling
git config --global pull.rebase true
Python Cheat Sheet With Mosh
§GitHub links
Update the following variables when appropriate:
USER
a GitHub user or organization, i.e.:moul
Pull-Requests
- In any repo of an user/organization: https://github.com/pulls?utf8=%E2%9C%93&q=is%3Aopen+is%3Apr+archived%3Afalse+user%3AUSER
- Opened by an user: https://github.com/pulls?utf8=%E2%9C%93&q=is%3Aopen+is%3Apr+archived%3Afalse+author%3AUSER
- Assignee to an user: https://github.com/pulls?utf8=%E2%9C%93&q=is%3Aopen+is%3Apr+archived%3Afalse+assignee%3AUSER
- Mentioning an user/a team: https://github.com/pulls?utf8=%E2%9C%93&q=is%3Aopen+is%3Apr+archived%3Afalse+mentions%3AUSER
- Requesting review from an user/a team: https://github.com/pulls?utf8=%E2%9C%93&q=is%3Aopen+is%3Apr+archived%3Afalse+review-requested%3AUSER
§Close a pull request from command line with “hub”
- Install “hub”
- Type
hub api -X PATCH /repos/$USER/$REPO/pulls/$ID
-F state=closed
§List projects in JSON
- Fetch:
hub api --paginate user/repos | jq . > github.json
- Only “moul’s” projects:
cat github.json | jq '.[] | select(.owner.login 'moul') > moul.json
- Remove some fields to have a smaller .json file:
cat moul.json | jq 'with_entries(select(.key|test('_url')|not)) | del(.owner) | del(.permissions) | del(.url) | del(.node_id)'
Or inline
§Bonus: find and close a pull-request named “Enabled GuardRails” in the current repository
§Manipulate JSON
§Flatten concatenated JSON files
Sometimes, when you run a command like this: hub api --paginate user/repos
, you get multiple JSON outputs in the same file.
jq
doesn’t care and you can run any jq command over the aggregated file, however, this .json file won’t be supported by most of the other softwares.
You can “repair” by flattening a concatenated JSON file by doing the following:
cat aggregate.json | sed 's/^]$$/],/;$$s/],/]]/;1s/^/[/' | jq '. | add'
The sed ...
command will transfer the standalones arrays into a a valid array of arrays.
The jq . | add
will flatten the array of arrays into a big 1 dimension array.
§Apply change on multiple files
§Replace a string by another in a whole Git repository
I’m using my https://github.com/moul/golang-repo-template project as repo template on GitHub.
The first task I need to do immediately after creating the new repo, is to replace every instance of golang-repo-template
in the codebase by lorem-ipsum
(the project name).
§Terminator on Windows
- Install
VcXsrv.exe
on Windows and configure it to start automatically with the system - Create a
startTerminator.sh
file with the following content:cd; export DISPLAY=:0; nohup terminator &; sleep 1
and change the permissionschmod +x startTerminator.sh
- Create a shortcut
C:WindowsSystem32bash.exe {12345678-1234-5678-0123-456789abcdef} /home/moul/startTerminator.sh
§Web
§Temporary static web server
And then open your browser on http://localhost:8000
§Generate directory listing
§Proxy to avoid caching
§Socat
§Connect to a TTY over TCP
§TCP to UDP proxy
This TCP proxy can be forwarded over SSH to have access to an UDP port from localhost from a remote host
§Media manipulation
§Loop a video with ffmpeg
Mosh Hamedani Python Cheat Sheet
- calculate the amount of loops needed using https://dan.hersam.com/tools/time-calc.html
for i in {1..383}; do printf 'file '%s'n' 'loop1.mp4' >> list.txt; done
ffmpeg -f concat -i list.txt -c copy output.mp4
See this status
§Download YouTube video cover image
Python Cheat Sheets Pdf
- the image of one video:
youtube-dl --write-thumbnail --skip-download https://www.youtube.com/watch?v=xxxxxxxx
- the image of multiple videos:
youtube-dl --write-thumbnail --skip-download -a urls.txt
with one URL per line inurls.txt