Create a virtual environment with python -m venv .venv. Activate it with .venv\Scripts\Activate.ps1 in PowerShell, or source .venv/bin/activate on macOS/Linux. Then run python -m pip install -r ...
description Use when rigging a character, creature or prop in Blender through Python: "rig this character", Rigify metarig fitting or generation errors, automatic weights or "Bone Heat Weighting ...