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Python-specific patterns: uv/poetry virtual environments, python -m imports, version pinning, pip restrictions on macOS.
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| name | Python Development |
| description | Python-specific patterns: uv/poetry virtual environments, python -m imports, version pinning, pip restrictions on macOS. |
Wrong -- bare python3 has no project dependencies:
python3 scripts/run_analysis.py
# ModuleNotFoundError: No module named 'pandas'
Right -- use the project's venv runner:
uv run python scripts/run_analysis.py
# Or: poetry run python scripts/run_analysis.py
# Or: pipenv run python scripts/run_analysis.py
Wrong -- direct execution breaks relative imports:
python scripts/etl/transform.py
# ModuleNotFoundError: No module named 'scripts.etl.utils'
Right -- use -m for scripts with package imports:
python -m scripts.etl.transform
Wrong -- uv auto-selects newest Python, packages lack wheels:
uv sync
# error: No wheel found for numpy on Python 3.14
Right -- specify a stable Python version:
# Check project requirements:
cat .python-version
# Pin the version:
uv sync --python 3.13
Wrong -- system pip blocked by PEP 668 on macOS:
pip3 install httpie
# error: externally-managed-environment
Right -- use brew for CLI tools, pipx for Python apps:
brew install httpie
# Or for Python-specific apps:
pipx install httpie