[Python-Dev] Assignment to None (original) (raw)
Nick Coghlan ncoghlan at gmail.com
Wed Jun 11 11:21:12 CEST 2008
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Thomas Lee wrote:
Martin v. Löwis wrote:
In Python 3, None, True, and False are keywords, so clearly, the intended semantics is also the implemented one (and the language description for 2.x needs to be updated/clarified).
Interestingly enough, the semantics of True, False and None are different from one another in 2.6: True = "blah" and False = 6 are perfectly legal in Python <=2.6.
True and False didn't get the same treatment as None because we didn't want to break the follow compatibility workaround for Python version prior to 2.2.2:
try: True except NameError: True, False = 1, 0
Cheers, Nick.
-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia
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