name: python-env-setup description: Use this skill to set up Python development environment, install dependencies, and configure virtual environments. Use when user requests Python environment setup, pip package installation, or encounters missing module errors.

Python Environment Setup Skill

Overview

This skill guides you on how to set up and manage a Python development environment in the workspace.

Environment Check

1. Check Python Version

First, use the bash tool to check the installed Python version:

bash(command="python3 --version")

Expected output similar to: Python 3.11.x

2. Check pip Version

bash(command="pip3 --version")

Installing Dependencies

Install from requirements.txt

If the project has a requirements.txt file:

bash(command="pip3 install -r requirements.txt")

Install Single Package

bash(command="pip3 install <package_name>")

Common package examples:

• pytest - Testing framework
• black - Code formatter
• flake8 - Code linter
• mypy - Type checker
• requests - HTTP library

Install Specific Version

bash(command="pip3 install package_name==1.2.3")

Virtual Environment (Optional)

If an isolated environment is needed:

Create Virtual Environment

bash(command="python3 -m venv .venv")

Activate Virtual Environment

Specify the virtual environment's Python when running commands:

bash(command=".venv/bin/pip install -r requirements.txt")

Running Python Code

Run Existing File

bash(command="python3 main.py")

Run Code Snippet

First write to a file using write_file, then run it:

write_file("./repo/check_env.py", """
import sys
print(f"Python version: {sys.version}")
print(f"Python path: {sys.executable}")
""")
bash(command="python3 ./repo/check_env.py")

Run Tests

bash(command="python3 -m pytest tests/ -v")

Troubleshooting

ModuleNotFoundError

When encountering a missing module error:

1. Confirm package name (pip package name might differ from import name)
2. Use pip3 install <package> to install the missing package
3. Check if requirements.txt contains the package

Permission Issues

If you encounter permission issues, use the --user flag:

bash(command="pip3 install --user <package_name>")

Best Practices

1. Always check requirements.txt first - Most projects list required dependencies
2. Use pip freeze to record dependencies - pip3 freeze > requirements.txt
3. Install dependencies before running - Avoid ImportError
4. Use -v parameter for verbose output - Facilitates debugging