Python in a Nutshell, 4th Edition by Alex Martelli & Anna Martelli Ravenscroft & Steve Holden & Paul McGuire

Author:Alex Martelli & Anna Martelli Ravenscroft & Steve Holden & Paul McGuire [Alex Martelli]
Language: eng
Format: epub, pdf
Publisher: O'Reilly Media, Inc.
Published: 2022-12-24T16:00:00+00:00

The Main Program

Execution of a Python application starts with a top-level script (known as the main program), as explained in “The python Program.” The main program executes like any other module being loaded, except that Python keeps the bytecode in memory, not saving it to disk. The module name for the main program is '__main__', both as the __name__ variable (module attribute) and as the key in sys.modules.

Don’t import the .py file you’re using as the main program

You should not import the same .py file that is the main program. If you do, the module is loaded again, and the body executes once more from the top in a separate module object with a different __name__.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.