How to recognize a generator function?
Bernhard Herzog
bh at intevation.de
Wed Jun 18 10:16:23 EDT 2003
Gonçalo Rodrigues <op73418 at mail.telepac.pt> writes:
> On Wed, 18 Jun 2003 03:21:35 -0700, Oscar Rambla <tecnic at codidoc.com>
> wrote:
[...]
> >How to recognize if a function is a generator function before calling it?
Why do you need to recognize that?
> Let us see...
>
> >>> from __future__ import generators
> >>> def testfunc():
> ... return None
> ...
> >>> testfunc
> <function testfunc at 0x010F05C0>
>>> testfunc.func_code.co_flags
4099
> >>> def testfunc():
> ... yield None
> ...
> >>> testfunc
> <function testfunc at 0x010F2750>
> >>>
>>> testfunc.func_code.co_flags
4131
So it's possible to distinguish the two, but I don't see why anyone
would care (except in some very special circumstances such as a
debugger, maybe).
Bernhard
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