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()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 somethingif __name__ == '__main__' in python
# if __name__ == '__main__' checks if a file is imported as a module or not.
# example:
def main():
print('Hello World')
if __name__ == '__main__':
# This code won't run if this file is imported.
main()if __name__ == '__main__': main()
print("before import")
def functionA():
print("Function A")
def functionB():
print(("Function B"))
print("before __name__")
if __name__ == '__main__':
functionA()
functionB()
print("after __name__")
#===Output===
#before import
#before __name__ guard
#Function A
#Function B
#after __name__ guardWhat does if __name_=="_main__": do?
# 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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