On Fri, 12 Dec 2008 11:50:38 -0500, Steve Holden wrote: > Kirk Strauser wrote: >> At 2008-12-12T15:51:15Z, Marco Mariani <ma...@sferacarta.com> writes: >> >>> Filip Gruszczyński wrote: >>> >>>> I am not doing it, because I need it. I can as well use "if not elem >>>> is None", >> >>> I suggest "if elem is not None", which is not quite the same. >> >> So what's the difference exactly? "foo is not None" is actually >> surprising to me, since "not None" is True. "0 is True" is False, but >> "0 is not None" is True. Why is that? > > "is not" is an operator, so the parse is > > foo (is not) None > > not > > foo is (not None) >
Personally, I'd prefer VB's version: foo IsNot bar or in pseudo-python foo isnot bar since that would make it less ambiguous. -- http://mail.python.org/mailman/listinfo/python-list
