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On 16/11/18 14:51, Steve Keller wrote: > Why do the integers 0 and 1 compare equal to the boolean values False > and True and all other integers to neither of them? > > $ python3 > Python 3.5.2 (default, Nov 12 2018, 13:43:14) > [GCC 5.4.0 20160609] on linux > Type "help", "copyright", "credits" or "license" for more information. > >>> 0 == False > True > >>> 1 == True > True > >>> 2 == False > False > >>> 2 == True > False > >>> -1 == False > False > >>> -1 == True > False > >>> > > Since these are objects of different types I would expect they cannot > be equal. I know that 0 means false and != 0 means true in C, C++, > etc. but in Python that surprises me. > > Steve > >>> isinstance(False, int) True >>> isinstance(True, int) True >>> False.real 0 >>> True.real 1 >>> At least in recent Pythons. Duncan

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