Nov 30, 2024 · See how Python's if __name__ == "__main__" check runs code only when the file is executed, so your imports stay clean and your scripts gain a clear entry point.

Jan 7, 2009 · When the Python interpreter reads a source file, it first defines a few special variables. In this case, we care about the __name__ variable. When Your Module Is the Main Program If you are …

Jan 12, 2026 · Before running a Python file, the interpreter sets a few special variables. One of them is __name__. If a Python file is run directly, Python sets __name__ to "__main__". If the same file is …

2 days ago · Python inserts an empty __main__ module in sys.modules at interpreter startup, and populates it by running top-level code. In our example this is the start module which runs line by line …

May 1, 2019 · In this step-by-step tutorial, you'll learn how Python main functions are used and some best practices to organize your code so it can be executed as a script and imported from another …

Aug 12, 2024 · The Python interpreter sets the __name__ variable to the name of the module if it's imported and to the string "__main__" if the module is the main entry point to the program.

Jul 3, 2020 · Python Modules Explained Python files are called modules and they are identified by the .py file extension. A module can define functions, classes, and variables. So when the interpreter …

Feb 2, 2026 · Learn how to use the Python main function correctly with if __name__ == '__main__' to structure scripts and control execution flow for better code.

Oct 28, 2010 · Why does python not support a professional main () function which is automatically executed by python code.py?

Python knows the usual control flow statements that other languages speak — if, for, while and range — with some of its own twists, of course. More control flow tools in Python 3 The core of extensible …