Python Scripts

This repository contains some helper scripts I've written for day-to-day use. It was part of the dotfiles repo earlier, but is now a separate repository for easier maintenance.

Notes:

1. Most of the things here can usually be achieved by using bash or <your favourite shell>, but python is easier.

2. Most files here are aliased conveniently in the aliasrc of the dotfiles repo, to make them actually usable.

Directory Structure

• sway/ — Sway/Wayland related scripts
• utils/ — General utility scripts
• rofi/ — Rofi launcher scripts
• waybar/ — Waybar status bar scripts
• cp-parser/ — Competitive programming parser

Content

1. utils/youtube.py

Depends On: xclipboard and youtube-dl (youtube-dlp).

This is a helper script on top of youtube-dl to make downloading way easier. This script can be installed by running curl -fsSL sh.txds.me/yt | bash, it installs both youtube-dlp and this wrapper script as well.

usage: youtube.py [-h] [-c] [-p] [-q {240p,360p,480p,720p,1080p,1440p}] [-a] [-o OUTPUT_DIR] [-r] [-i] [-e] [-t]

Helper Script for youtube-dl.

optional arguments:
  -h, --help            show this help message and exit
  -c                    Get video link from clipboard.
  -p                    Treat the link as if it is a playlist.
  -q {240p,360p,480p,720p,1080p,1440p}
                        Default is 360p
  -a                    Download best quality audio only.
  -o OUTPUT_DIR         Default is current directory.
  -r                    Do not download, just output the generated command only.
  -i                    Print list of available formats to download.
  -e                    Use aria2c as the external downloader
  -t                    Custom script for twitch

Examples

$ yt -cq 720p # video
$ yt -cap # mp3 songs playlist
$ yt -cpq 480p # downloading lectures playlist
$ yt -rcpq 1080p # debug, check if the command is okay
$ yt -tcq 360p # download twitch vod

2. sway/display.py

Depends On: xrandr (X11) or wlr-randr (Wayland).

Manages display configurations for multi-monitor setups. Supports switching between laptop_only, external_only, external_mirrors_laptop, and external_extends_laptop.

You need to first populate Config class to match your setup before use.

Usage: ./display.py <laptop_only | external_only | external_mirrors_laptop | external_extends_laptop>

Examples

$ display.py laptop_only
$ display.py external_only
$ display.py external_mirrors_laptop
$ display.py external_extends_laptop

3. sway/wallpaper.py

Sets random wallpapers from ~/Pictures/walls on multi-monitor Sway setups using swaybg.

Examples

$ wallpaper.py

4. sway/wlsunset.py

Starts or kills wlsunset for blue-light filtering on Wayland.

Examples

$ wlsunset.py     # start wlsunset
$ wlsunset.py kill  # kill wlsunset

5. utils/cc.py and cp-parser/

This script is useful for compiling C and C++ files, this was created when I was unaware of makefiles, but it's handy while testing C or C++ code snippets. Also included prep subcommand that takes / asks for a directory name, and optionally takes -f argument.

All scripts are aliased conveniently in aliasrc.

prep command does the following:

1. Ask for dir_name if not provided in args.
2. Create a new dir named dir_name.
3. If -f was provided then create 6 empty files in the newly created directory, namely A.cpp, B.cpp, ..., F.cpp, otherwise skip this step.
4. Copy bits/stdc++.h from the user's machine to the newly created directory. This is useful because it used to take ~7 seconds to compile each C++ file on a slow laptop. By precompiling this header locally, each individual C++ file now compiles in ~1-2 seconds—huge time savings!
5. Compile the locally copied bits/stdc++.h header.
6. Done!

Notes for cp-parser

cp-parser/server.py listens to POST requests to a specified port, the competitive companion browser extension posts parsed problems to this endpoint, and creates a samples directory, for each testcase.

cp-parser/run.py compiles and runs the program against the parsed sample test cases.

cp-parser/run.py custom compiles, and runs against user input.

server.py is used as a daemon process, in the background so it's aliased as cphd.

run.py is used as a script, so it's aliased as cpr.

Examples

$ c test_pointers.c # compiles and runs the C file
$ cpp wow.cpp # compiles and runs the C++ file
$ prep abc175 # does the steps mentioned above

6. utils/days.py

Counts the time elapsed since a given start date. Handy for quickly finding how much time has passed since some date, e.g., a birthday.

Examples

$ days #gives time elapsed since predefined date
$ days <anything> # asks for a date, gives age

7. utils/imports.py

Created to avoid repeatedly writing import math every time I want to use Python as a calculator. It also includes additional functions from combinatorics and number system conversions.

Examples

$ pc # imports mostly used modules
>>> log(10,2) # and starts this interactive shell
3.3219280948873626
>>>
# or 
$ pc
>>> C(12,5) # binomial coeff.

8. utils/chop.py

USAGE

Depends on: ffmpeg.

$ chop <input.mp3> <segments.txt> <output_dir>

Splits input.mp3 file to smaller .mp3 files according to timestamps defined in segments.txt, and saves each file to the specified output_dir, output_dir is created if it does not exist.

Sample segments.txt

00:05 INTRO
03:49 First Part
07:34 Second Part

will split the input.mp3 into

INTRO.mp3 -> 00:05 - 03:48
First Part.mp3 -> 03:49 - 07:34
Second Part.mp3 -> 07:34 - 09:32

Assuming 09:32 is the duration of input.mp3

9. rofi/powermenu.py

A graphical power menu (shutdown, reboot, lock, suspend, logout) using Rofi.

10. waybar/music.py

Displays current playback info from playerctl for use in Waybar status bar.