On Wed, May 26, 2010 at 5:53 PM, Colin H <hawk...@gmail.com> wrote:
> Thanks for the possible workaround - unfortunately 'stuff' will
> contain a whole stack of things that are not in 'context', and were
> not defined in 'user_code' - things that python embeds - a (very
> small) selection -
>
> {..., 'NameError': <type 'exceptions.NameError'>, 'BytesWarning':
> <type 'exceptions.BytesWarning'>, 'dict': <type 'dict'>, 'input':
> <function input at 0x10047a9b0>, 'oct': <built-in function oct>,
> 'bin': <built-in function bin>, ...}
>
> It makes sense why this happens of course, but upon return, the
> globals dict is very large, and finding the stuff you defined in your
> user_code amongst it is a very difficult task. Avoiding this problem
> is the 'locals' use-case for me. Cheers,
No, if taken literally that doesn't make sense. Those are builtins. I
think you are mistaken that each of those (e.g. NameError) is in stuff
-- they are in stuff['__builtins__'] which represents the built-in
namespace. You should remove that key from stuff as well.
--Guido
> Colin
>
> On Thu, May 27, 2010 at 1:38 AM, Guido van Rossum <gu...@python.org> wrote:
>> This is not easy to fix. The best short-term work-around is probably a
>> hack like this:
>>
>> def define_stuff(user_code):
>> context = {...}
>> stuff = {}
>> stuff.update(context)
>> exec(user_code, stuff)
>> for key in context:
>> if key in stuff and stuff[key] == context[key]:
>> del stuff[key]
>> return stuff
>>
>> --
>> --Guido van Rossum (python.org/~guido)
>>
>
--
--Guido van Rossum (python.org/~guido)
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