On Thursday, March 5, 2015 at 3:20:16 PM UTC-8, Ben Finney wrote: > sohcahto...@gmail.com writes: > > > I would argue that if `a is b` then it is obvious that `a == b` > > It may be obvious, but it's not necessarily true. Some commonly-used > values - for example, an "null" - are not equal to themselves, by > definition. > > It is fine to define such a type in Python, because 'is' does not > necessarily imply '=='. > > > I would also argue that the "in" operator *SHOULD* be using equality > > of value. > > Hopefully you can see how that argument is incorrect. > > -- > \ "Yesterday I told a chicken to cross the road. It said, 'What | > `\ for?'" --Steven Wright | > _o__) | > Ben Finney
Do you have an example of where `a is b` but `a != b` in Python? `None == None` is True. -- https://mail.python.org/mailman/listinfo/python-list
