Python

• Keywords: https://www.w3schools.com/python/python_ref_keywords.asp

Standard Library

• Standard Libraries complexity: https://www.geeksforgeeks.org/complexity-cheat-sheet-for-python-operations/
• Types: https://docs.python.org/3/library/stdtypes.html
• Data Structures:https://docs.python.org/3/tutorial/datastructures.html

Packages

• Standard Libraries: https://docs.python.org/3/library/index.html
• Modules/Packages: https://pypi.org/

Interpreter

• You can configure your IDE to use a python interpreter (the python binary) with a specific version
• The python binary can also be picked from your chosen virtual environment
• On vscode, Python: Select Interpreter

Virtual Environment

• Each virtual environment is created based on a python interpreter (version)
• A virtual environment contains all libraries and binaries isolated from the operating system
• Even the python binary is isolated (although symlinked to the system python binary)
• Options
• venv: the native virtual environment solution
• virtualenv: 3rd party
• pipenv: 3rd party, more recent

python -m venv .venv
source ./.venv/bin/activate # bash
source ./.venv/bin/activate.fish # fish
echo $VIRTUAL_ENV
echo $PATH

Language Server

• Jedi: Community-driven

• Pylance: Developed by Microsoft

• With homebrew, source files are installed at /opt/homebrew/Cellar/[email protected]/3.12.1_1/Frameworks/Python.framework/Versions/3.12/lib/python3.12

Linter & Formatter

• https://code.visualstudio.com/docs/python/linting

• Ruff https://github.com/astral-sh/ruff-vscode

• Flake8: By Microsoft

Expression vs. Statement

• Statement: any unit of code
• Expression: special statement that evaluates to some value

# Expression
1 + 2 # evaluates to 3
"a" if 1 != 1 else "b" # evaluates to "a"

# Statement (assignment)
foo = 1 + 2 # doesn't return any value