Steven D'Aprano steve+comp.lang.python at pearwood.info
Fri Dec 5 07:34:04 EST 2014

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Ned Batchelder wrote:

> On 12/5/14 4:53 AM, Steven D'Aprano wrote:
>> Oh, I learned something new: strictly speaking, this is implementation-
>> dependent and not guaranteed to work in the future!
>>
>> def func():
>>      global math
>>      import math
> 
> I don't think this is implementation-dependent.

The docs say that it is:

https://docs.python.org/3/reference/simple_stmts.html#the-global-statement

    Names listed in a global statement MUST NOT [emphasis added] be 
    defined as formal parameters or in a for loop control target, 
    class definition, function definition, or import statement.

    CPython implementation detail: The current implementation does not
    enforce the two restrictions, but programs should not abuse this
    freedom, as future implementations may enforce them or silently 
    change the meaning of the program.



-- 
Steven

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