python-env
Fast Python environment management with uv (10-100x faster than pip). Triggers on: uv, venv, pip, pyproject, python environment, install package, dependencies.
What this skill does
# 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
```bash
# 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
```bash
# 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
```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
```bash
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-patterns` - Type hints for projects
- `python-pytest-patterns` - Testing infrastructure
- `python-fastapi-patterns` - Web API development
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