Python Environment
Fast Python environment management with uv.
Quick Commands
| Task | Command |
|---|---|
| Create venv | uv venv |
| Install package | uv pip install requests |
| Install from requirements | uv pip install -r requirements.txt |
| Run script | uv run python script.py |
| Show installed | uv pip list |
Virtual Environment
# Create venv (instant)
uv venv
# Create with specific Python
uv venv --python 3.11
# Activate (or use uv run)
source .venv/bin/activate # Unix
.venv\Scripts\activate # Windows
Package Installation
# Single package
uv pip install requests
# Multiple packages
uv pip install flask sqlalchemy pytest
# With extras
uv pip install "fastapi[all]"
# Version constraints
uv pip install "django>=4.0,<5.0"
# Uninstall
uv pip uninstall requests
Minimal pyproject.toml
[project]
name = "my-project"
version = "0.1.0"
requires-python = ">=3.10"
dependencies = [
"httpx>=0.25",
"pydantic>=2.0",
]
[project.optional-dependencies]
dev = [
"pytest>=7.0",
"ruff>=0.1",
]
Project Setup Checklist
mkdir my-project && cd my-project
uv venv
# Create pyproject.toml
uv pip install -e ".[dev]"
uv pip list
Troubleshooting
| Issue | Solution |
|---|---|
| "No Python found" | uv python install 3.11 |
| Wrong Python version | uv venv --python 3.11 |
| Conflicting deps | uv pip compile --resolver=backtracking |
| Cache issues | uv cache clean |
When to Use
- Always use uv over pip for speed
- Creating virtual environments
- Installing packages
- Managing dependencies
- Running scripts in project context
Additional Resources
For detailed patterns, load:
./references/pyproject-patterns.md- Full pyproject.toml examples, tool configs./references/dependency-management.md- Lock files, workspaces, private packages./references/publishing.md- PyPI publishing, versioning, CI/CD
See Also
This is a foundation skill with no prerequisites.
Build on this skill:
python-typing-ops- Type hints for projectspython-pytest-ops- Testing infrastructurepython-fastapi-ops- Web API development