Virtual Environments and pip

Virtual Environments and pip\n\nA virtual environment isolates a project's Python interpreter and its third‑party packages, preventing version conflicts across projects.\n\nbash\n# Create a virtual environment named .venv\npython -m venv .venv\n\n# Activate (Linux/macOS)\nsource .venv/bin/activate\n\n# Activate (Windows)\n.\\venv\\Scripts\\activate\n\n# Upgrade pip inside the env\npip install --upgrade pip\n\n# Install a library, e.g., requests\npip install requests\n\n# Freeze exact versions for reproducibility\npip freeze > requirements.txt\n\n\nWhenever you start work on the project, activate the environment first. Deactivate with the deactivate command or simply close the terminal.\n