''' 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

'''