Are you all certain that this mapping from a generator expression to a foor loop isn't just a happy coincidence? After all, the generator statement is just a generalization of the list comprehension and that doesn't map quite so directly.
I have always taken both expressions at face value, and not tried to map them into something else. Why should you, since they are designed to match the grammar of the english language and make perfect sense if you read them as you would a herring recipe. The suggested "while" keyword expands on this easy to understand theme, and the fact that it doesn't fit a mapping that was probably never intentional shouldn't detract from that. K -----Original Message----- From: python-dev-bounces+kristjan=ccpgames....@python.org [mailto:python-dev-bounces+kristjan=ccpgames....@python.org] On Behalf Of Terry Reedy Sent: 19. janúar 2009 17:52 To: python-dev@python.org Subject: Re: [Python-Dev] PEP 3142: Add a "while" clause to generator expressions The other, posted by Steven Bethard, is that it fundamentally breaks the current semantics of abbreviating (except for iteration variable scoping) an 'equivalent' for loop. This should have been listed in the PEP under Objections (or whatever the section. I did not bother to second his objection there but will now. -1 _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
