| Dir : /usr/share/doc/python3-docs/html/_sources/library/ |
| Server: Linux server1.ngambekcore.com 4.18.0-553.51.1.el8_10.x86_64 #1 SMP Wed Apr 30 04:00:07 EDT 2025 x86_64 IP: 159.198.77.92 |
| Dir : //usr/share/doc/python3-docs/html/_sources/library/__main__.rst.txt |
:mod:`__main__` --- Top-level script environment
================================================
.. module:: __main__
:synopsis: The environment where the top-level script is run.
--------------
``'__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 or not it is running in the main scope by
checking its own ``__name__``, which allows a common idiom for conditionally
executing code in a module when it is run as a script or with ``python
-m`` but not when it is imported::
if __name__ == "__main__":
# execute only if run as a script
main()
For a package, the same effect can be achieved by including a
``__main__.py`` module, the contents of which will be executed when the
module is run with ``-m``.