Style in list comprehensions

[Carl Banks]

Tim Lesher wrote:
> Suppose I have a list of objects and I want to call a method on each. 
> I can do the simple:
> 
> for i in objs:
>    i.meth(arg1, arg2)
> 
> or using list comprehensions:
> 
> [i.meth(arg1, arg2) for i in objs]
> 
> The second feels more Pythonic,

I disagree.  I suspect most Pythonistas would disagree, too.


> but do I incur any overhead for
> creating the list of results when I'm not going to use it?

Of course you do.  You've devoted time and RAM (temporarily) to
allocating a list you'll never use.  Only you can decide whether the
overhead is significant to you.

Regardless, just from a stylistic standpoint, I highly discourage
using a list comp only for it's side effects.


-- 
CARL BANKS
"You don't run Microsoft Windows.  Microsoft Windows runs you."