On Tue, Aug 12, 2014 at 12:32 AM, Robin Becker <ro...@reportlab.com> wrote: > Of course Python can be even more confusing so that for example > >>>> class NeverEqual(int): > ... def __new__(cls,v): > ... self = int.__new__(cls,v) > ... return self > ... def __eq__(self,other): > ... return False > ... >>>> a=NeverEqual(1) >>>> a > 1 >>>> a==1 > False >>>> a==a > False >>>> not (a != a) > True >>>> a!=a > False >>>> > > so I think that assignment doesn't always make things equal even > chronologically.
Sure, but at this point you're fiddling with the definition of equality, and Python has never stopped you from shooting yourself in the foot :) There are less contrived examples, too, like those involving floating-point round-off, which basically prove that Python's equality comparison is not the same as mathematical equality; but that doesn't stop people from comprehending that "1 + 3 == 2 + 2" in Python based on their knowledge of mathematics. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
