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 module.

1 day ago · In Python, the special name __main__ is used for two important constructs: the name of the top-level environment of the program, which can be checked using the __name__ == '__main__' expression; and. the __main__.py file in Python packages.

Aug 9, 2024 · Main function is like the entry point of a program. However, Python interpreter runs the code right from the first line. The execution of the code starts from the starting line and goes line by line. It does not matter where the main function is …

Oct 28, 2010 · __main__ — Top-level script environment '__main__' is the name of the scope in which top-level code executes. A module’s __name__ is set equal to '__main__' when read from standard input, a script, or from an interactive prompt.

Dec 1, 2022 · Python looks for a file named __main__.py to start its execution automatically. If it doesn’t find it will throw an error else it will execute main.py and from the code, you can well understand that it will import the modules from src to find the area. So now we have learned how __main__.py works. Now, let’s take a look at its biggest advantages:

Feb 8, 2016 · Execute the Python code contained in script, which must be a filesystem path (absolute or relative) referring to either a Python file, a directory containing a __main__.py file, or a zipfile containing a __main__.py file.

Apr 12, 2025 · Conclusion. The if __name__ == '__main__': pattern is a fundamental part of Python programming. It provides a clean way to separate code meant for execution from code meant for reuse. Whether you’re building libraries, utilities, or simple scripts, understanding this idiom helps you write better organized and more modular Python code.

May 25, 2022 · In this guide, I’ll explain how including a main () function, though not required in Python, can structure your programs in a logical way and ensure that your functions are executed only when expected. The Python ecosystem is very …

__main__ is the name of the scope in which top-level code executes. A module’s name is set equal to __main__ when read from standard input, a script, or from an interactive prompt. A module can discover whether it is running in the main scope by checking its own __name__, which allows a common idiom for conditionally executing code in a module.

The Python "main" construct i.e., if __name__ == "__main__", plays an important role in controlling the execution of all your Python scripts. It allows you to differentiate between script execution as a standalone program or as an imported module.