python name == 'main' ||Python Tutorial #18 || Python Tutorial for Beginners

Опубликовано: 27 Октябрь 2024
на канале: Code4You

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This is my 18th python tutorial for beginners -
python _name_ == '__main__' ||Python Tutorial #18 || Python Tutorial for Beginners

'__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.

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This module provides a portable way of using operating system dependent functionality.

===Code===
def main():
print "You are directly running file01"

def anoter_method():
print "You are running indirectly "

if _name_ == '__main__':
main()
else:
anoter_method()

_name_ in python
_main_ in python

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