[Python-Dev] Fast access to __builtins__

[M.-A. Lemburg]

Guido van Rossum wrote:
>>>I'd be happy to proclaim that doing something like
>>>
>>>  import X
>>>  d = X.__dict__
>>>  d["spam"] = 42    # or  exec "spam = 42" in d 
>>>
>>>is always prohibited.
>>
>>That would break lazy module imports such as the one I'm using
>>in mx.Misc.LazyModule.py.
> 
> But you could rewrite LazyModule.py to use setattr(X, "spam", 42), right?

Sure.

> I don't think it's worth it to have a dict proxy that allows certain
> keys to be set but not others.

The question is: why make this complicated ?

If the programmer
enables __fast_builtins__ (or similar) in the module scope,
she should be aware that tweaking the module globals from the
outside won't have the desired effect.

-- 
Marc-Andre Lemburg
eGenix.com

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