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Jainesh Patel11,100 Points
what does this do
def main(): pass if __name__ == "__main__": main()
[MOD: added ```python formating -cf]
Steven Parker224,872 Points
"Pass" does nothing, so currently the "main" function does not do anything.
Without Markdown formatting, the original syntax is lost, but assuming you meant to test "
__name__", that determines if the file is being run by itself instead of being included by another program.
Chris FreemanTreehouse Moderator 68,332 Points
Good question! This is a common python idiom to detect if a module is imported or being executed directly.
When a python module is imported into another module, its
__name__ attribute is set to be the same as the module name. When a python module is executed, the top level module attribute
__name__ is changed to be "
__main__". This way a module can tell the difference between if it is being imported or executed.
The python idiom
if __name__ == "__main__": main()
says, "if my
__name__ attribute has been changed to the string "
__main__", then execute the function
main(). The "
pass" would be replaced with the code to be executed.
Post back if you have more questions. Good luck!!