python-env

name	python-env
description	Python environment management with venv, Poetry, Pipenv, pyenv, and conda. Use when user asks to "create virtual environment", "set up Poetry", "manage Python versions", "fix pip issues", "install dependencies", "create requirements.txt", or any Python environment tasks.

Python Environment Management

Virtual environments, dependency management, and Python version control.

venv (Built-in)

# Create virtual environment
python -m venv .venv
python3 -m venv .venv

# Activate
source .venv/bin/activate          # Linux/macOS
.venv\Scripts\activate             # Windows

# Deactivate
deactivate

# Install packages
pip install requests flask
pip install -r requirements.txt

# Freeze dependencies
pip freeze > requirements.txt

# Upgrade pip
pip install --upgrade pip

requirements.txt

# Pinned versions (production)
flask==3.0.0
requests==2.31.0
sqlalchemy==2.0.23

# Ranges (library development)
flask>=3.0,<4.0
requests~=2.31            # Compatible release (>=2.31, <3.0)

# With extras
fastapi[all]==0.104.0

# From git
git+https://github.com/user/repo.git@main#egg=package

# Separate dev dependencies
pip install -r requirements.txt
pip install -r requirements-dev.txt

Poetry

# Install Poetry
curl -sSL https://install.python-poetry.org | python3 -

# Create new project
poetry new my-project
poetry init  # In existing project

# Add dependencies
poetry add requests flask
poetry add pytest --group dev
poetry add 


poetry remove requests


poetry install
poetry install --without dev


poetry update
poetry update requests      


poetry show
poetry show --tree


poetry run python main.py
poetry run pytest


poetry shell


poetry build
poetry publish


poetry  -f requirements.txt --output requirements.txt
poetry  -f requirements.txt --without-hashes