On Fri, 4 Jun 2010 09:00:13 am ALAN GAULD quoted Tino Dai who wrote: > "Tino Dai" <obe...@gmail.com> wrote [...] > >> I have code that is unpythonic in many places. It works, but > >> it's ugly. One of those unpythonic places is I'm initializing some > >> variable such as a list,dict, or whatever outside of if/while/for > >> in block to use later. So, I'm cleaning those places up. > >> > >> For example, my present code looks like: > >> L = [] # Needed or L doesn't exist outside of for loop > >> below for o in a: > >> if o.someAttribute > someConstant: > >> L.append(o.someOtherAttribute) > >> > >> .... later in code .... > >> <some use of L>
There's nothing unpythonic about that code. For loops existed in Python since the very earliest days, which is *at least* 1991, while list comprehensions are a newcomer. But if you insist on a list comprehension, you can re-write the above for-loop as: L = [o.someOtherAttribute for o in a if o.someAttribute > someConstant] -- Steven D'Aprano _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
