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

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

    return 1112

'''
# test function f()
# we can invoke/use the function we've defined in the same module
result = f()
print( 'testing result:', result )
'''

# don't modify this if you see this in your program file!!!!
# testing within a "main" block
# runs every time we import im_a_module
# if we run the module that's the same name as im_a_module (this file - so run im_a_module)
#   then the __name__ variable is set to "__main__"
# then we invoke the f() function
# don't worry about this too much, it'll be written for you
if ( __name__ == '__main__' ):    # __name__ is a built in python variable.
    print( "__name__ =", __name__ )
    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

else:
    print("__name__ =", __name__)