Python §

• 📑 Official Docs | docs.python.org

Topics §

• Python pip -> python package manager
• Python venv -> python virtual environments
• pyproject.toml -> instead of requirements.txt or setup.py
• MyPy (TODO) -> a type checker for python
• Python ruff -> ruff a fast python linter and code formatter
• Python Conda

Python boilerplate §

• 📑 __main__ - Top-level code environment | docs.python.org

Simple '__main__' usage

if __name__=='__main__':
	print("hello world")

With main function, runnable as program:

import sys
 
def main() -> int:
	a=2+2
	print(f"2+2={a}")
 
if __name__=='__main__':
	sys.exit(main())

Creating Python packages §

ModuleNotFoundError: No module named XXXX §

Context:

from myfolder.myClass import myClass

Error: ModuleNotFoundError: No module named 'myFolder'

Assuming you are using something like pyproject.toml, you can fix this by doing, from the home directory:

pip install -e .
python -m scripts.my_script.py

This ensures that Python set the home in the home of the project, and so