python main
def main():
print("Hello World!")
if __name__ == "__main__":
main()python main
def main():
print("Hello World!")
if __name__ == "__main__":
main()python if __main__
#Add this code to run a support module on its own.
#Great for running quick tests.
if __name__ == "__main__":
function_that_starts_the_module_to_run_on_its_own()
#or
test_function_included_in_module()__name__== __main__ in python
# If the python interpreter is running that module (the source file)
# as the main program, it sets the special __name__ variable to have
# a value “__main__”. If this file is being imported from another
# module, __name__ will be set to the module’s name.
if __name__=='__main__':
# do somethingpython if name == main example
# It's as if the interpreter inserts this at the top
# of your module when run as the main program.
__name__ = "__main__"explained if name main python
# Suppose this is foo.py.
print("before import")
import math
print("before functionA")
def functionA():
print("Function A")
print("before functionB")
def functionB():
print("Function B {}".format(math.sqrt(100)))
print("before __name__ guard")
if __name__ == '__main__':
functionA()
functionB()
print("after __name__ guard")Copyright © 2021 Codeinu
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