Re: Quick question about None and comparisons
Ok thanks. I'll avoid to do that. --- Giampaolo http://code.google.com/p/pyftpdlib/ -- http://mail.python.org/mailman/listinfo/python-list
Quick question about None and comparisons
Sorry for the title but I didn't find anything more appropriate. To have a less verbose code would it be ok doing: if a b: ...instead of: if a is not None and a b: ...? Is there any hidden complication behind that? Thanks in advance --- Giampaolo code.google.com/p/pyftpdlib/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Quick question about None and comparisons
On Nov 24, 7:52 pm, Giampaolo Rodola' [EMAIL PROTECTED] wrote: Sorry for the title but I didn't find anything more appropriate. To have a less verbose code would it be ok doing: if a b: ...instead of: if a is not None and a b: ...? Is there any hidden complication behind that? Thanks in advance --- Giampaolo code.google.com/p/pyftpdlib/ you are doing 2 different things there the first only ask IS a greater than b? the second ask IF a IS NOT none and a IS greater than b one is not shorthand for the other in all circumstances! -- http://mail.python.org/mailman/listinfo/python-list
Re: Quick question about None and comparisons
On Mon, Nov 24, 2008 at 5:52 PM, Giampaolo Rodola' [EMAIL PROTECTED] wrote: Sorry for the title but I didn't find anything more appropriate. To have a less verbose code would it be ok doing: if a b: ...instead of: if a is not None and a b: ...? Is there any hidden complication behind that? Yes. In Python 3.0, doing non-equality comparisons with None will raise a TypeError because it's nonsensical to ask whether two objects of unrelated types are less than or greater than each other (e.g Is [1,2] ab ?). Assuming `a` will never take on a value considered boolean false, you can do `if a and a b:` instead. Cheers, Chris -- Follow the path of the Iguana... http://rebertia.com Thanks in advance --- Giampaolo code.google.com/p/pyftpdlib/ -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
