""" Purpose: help introduce tester statement if ( __name__ == '__main__' )
"""

def f() :
    """ Purpose: be a function
    """

    return 1112

# test function f()
# result = f()
# print( 'testing result:', result )

# tl;dr: this block of code will only run when you run im_a_module.py directly, not when it is imported
# print( "__name__ = " , __name__ )

# all future modules will contain a statement like this that calls the tester so you don't have to switch back and forth
# you will not have to write this, just understand basically what is happening
# this just allows us to use modules more dynamically and is really really useful in the testing/development process
if ( __name__ == '__main__' ):    # __name__ is a built in python variable.
    import im_a_tester_program    #   it is set to the string '__main__' if
                               #       you are running the file as a program
                                  #   it is set to the name of the file if
                                  #       the file is being imported