[Python-ideas] List-comprehension-like extensions in normal for loops

Eyal Lotem eyal.lotem at gmail.com
Sat Mar 1 23:57:08 CET 2008


How about just nesting the for's/if's?

for record in db:
  if record.name == 'pierre':
    ...

Isn't that the one obvious way to do it?

On Sun, Mar 2, 2008 at 12:24 AM, Adam Atlas <adam at atlas.st> wrote:
> How about letting ordinary for loops contain multiple "for"s and
>  optionally "if"s like in list comprehensions and generator
>  expressions? For example, on a site I was just looking at, it had the
>  line:
>      for record in [ r for r in db if r.name == 'pierre' ]:
>  which could instead be:
>      for record in db if record.name == 'pierre':
>
>  And of course there could be much more complex ones too. I know you
>  could just do "for x in <some generator expression>" and get the same
>  effect and roughly the same speed, but I think this looks a lot nicer,
>  and it would make sense to have this sort of consistency across the
>  multiple contexts in which "for" can be used.
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