Reference library

Modern tooling

uv, ruff, pyproject.toml, packaging, and current Python project workflows.

1 match
Modern tooling easy

How to Create a Mock Virtualenv with an Activation Script in Python

Create a mock virtualenv directory with a generated bash activation script using Python's standard library.

virtualenv mock subprocess
Python 
import os
import subprocess
import sys
from pathlib import Path


def mock_virtualenv(name: str = "myenv") -> Path:
    """Create a mock virtualenv directory and activation script."""
    env_dir = Path(name)
    env_dir.mkdir(exist_ok=True)
    (env_dir / "bin").mkdir(exist_ok=True)

    activate_script = f"""#!/bin/…
13 0 Open

Browse by section

Each section groups closely related Python snippets.

Modern tooling — Python code examples

What you will find here

This page collects modern tooling snippets — short, copy-ready Python you can paste into our free online IDE and run without installing anything. Each sample includes a plain-English explanation and the full source code.

Samples vs tutorials and challenges

Samples are quick reference — one concept per page. For step-by-step teaching, use our Python tutorials. To test yourself, try quizzes or coding challenges. Clean up style with the Python formatter.

Related coding tools

Free online Python IDE Write and run Python in your browser — no install. Free Python code formatter Format with autopep8 — side-by-side PEP 8 cleanup. Python code samples Copy-ready snippets to study and run in the IDE.