Half-baked idea: list comprehensions with "while"

[Tim Chase]

On 04/27/12 07:23, Chris Angelico wrote:
> On Fri, Apr 27, 2012 at 10:17 PM, John O'Hagan<research at johnohagan.com>  wrote:
>> results = [x = expensive_call(i) for i in iterable if condition(x)]
>
> Nest it:
>
> results = [x for x in (expensive_call(i) for i in iterable) if condition(x)]

While it's what I do in cases like this, the nesting is not 
nearly as readable as John's suggested syntax.  Granted, the 
ability to do assignments in such a context opens up a whole can 
of unpythonic worms, so I'd suggest the following for clarity:

   temp = (expensive_call(i) for i in iterable)
   results = [x for x in temp if condition(x)]

-tkc