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A boolean type didn't come about until version 2.3, and even now they still inherit from integers. Some links for you: https://docs.python.org/3.7/whatsnew/2.3.html#pep-285-a-boolean-type https://docs.python.org/3.7/library/stdtypes.html#boolean-values https://docs.python.org/3.7/reference/datamodel.html#the-standard-type-hierarchy -----Original Message----- From: Python-list [mailto:python-list-bounces+david.raymond=tomtom.com at python.org] On Behalf Of Steve Keller Sent: Friday, November 16, 2018 9:51 AM To: python-list at python.org Subject: Why do integers compare equal to booleans? 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 -- https://mail.python.org/mailman/listinfo/python-list

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