""" 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 )

"""
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

"""