[Ka-Ping Yee] > Consider this: >> >>> a = [0, False, 1, True] >> >>> print a > [0, 0, 1, 1] >> >>> for x in a: print x > 0 > 0 > 1 > 1 Actually, if you use the sample code provided by the PEP and run this you get: >>> a = [0, False, 1, True] >>> print a [0, False, 1, True] >>> for x in a: print x 0 False 1 True