[Baypiggies] introspecting for generator vs non-generator function

[wesley chun]

On Fri, Nov 14, 2008 at 8:04 PM, Alex Martelli <aleaxit at gmail.com> wrote:
> On Fri, Nov 14, 2008 at 7:44 PM, Matt Good <matt at matt-good.net> wrote:
>> There's a co_flags for that:
>> "The following flag bits are defined for co_flags: ... bit 0x20 is set if
>> the function is a generator."
>>
>> So:
>> def is_generator(func):
>>  return bool(func.func_code.co_flags & 0x20)
>
> Yes it was -- I just approved it.  Thanks!  If there's one thing that
> makes me even happier than teaching, it's learning!-)


i have to agree with alex... that was a great find matt!  for those
interested in exploring further where he found it, it's in the 2.5.2
docs:

http://www.python.org/doc/2.5.2/ref/types.html
look for the "Internal Types" -> "Code Objects" section where it reads
as follows:

"The following flag bits are defined for co_flags: bit 0x04 is set if
the function uses the "*arguments" syntax to accept an arbitrary
number of positional arguments; bit 0x08 is set if the function uses
the "**keywords" syntax to accept arbitrary keyword arguments; bit
0x20 is set if the function is a generator."

cheers,
-- wesley
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wesley.j.chun :: wescpy-at-gmail.com
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