Python

Description¶

My notes on Python Programming Language

Install¶

Add Python PPA:

sudo add-apt-repository ppa:deadsnakes/ppa

This also outputs a list of the latest Python versions for each distro.

Update local PPA cache:

sudo apt update

Install selected version:

sudo apt-get install python3.12 python3-pip

Virtual Environment¶

Some Python-based projects require a virtual env.

When a venv is activated for a proj, pip will install all pkgs in [project_dir]/.venv. This isolates the proj with its own specific Python interpreter, and software libs and binaries.

Create venv¶

Create .venv under proj dir:

cd [proj-dir]
python3 -m venv .venv

Activate venv¶

Activate Python virtual env:

source .venv/bin/activate

pip will now install every Python pkg into ./.venv until venv is deactivated (exit or Ctrl-C or close terminal).

A project's venv must be re-activated (source .venv/bin/activate) to install more pkgs or run services.

Add Shortcut to `.bash_aliases`¶

alias activate-venv="source ./.venv/bin/activate"

List Installed venv Pkgs¶

To list installed pkgs while venv is activated:

pip list