The `__main__.py` File: The Front Door to Your Python Package
· 5 min read
If __init__.py is the receptionist that organizes your package, then __main__.py is the front door. It's the specific file Python looks for when you try to execute a directory as if it were a single script.
In 2026, as Python applications become more modular, __main__.py has become the standard way to provide a Command Line Interface (CLI) for your tools.