[Python-Dev] variable name resolution in exec is incorrect

Michael Foord fuzzyman at voidspace.org.uk
Thu May 27 01:33:46 CEST 2010


On 27/05/2010 00:38, Greg Ewing wrote:
> Mark Dickinson wrote:
>
>>>>> code = """\
>>
>> ... y = 3
>> ... def f():
>> ... return y
>> ... f()
>> ... """
>>
>>>>> exec code in {} # works fine
>>>>> exec code in {}, {} # dies with a NameError
>
> Seems to me the whole idea of being able to specify
> separate global and local scopes for top-level code is
> screwy in the first place. Are there any use cases for
> it? Maybe the second scope argument to exec() should
> be deprecated?
>
Sounds good to me, certainly ends the confusion over this undoubtedly 
unintuitive behaviour. :-)

Michael


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