[Python-Dev] [SPAM?] Re: PEP 558: Defined semantics for locals()

Greg Ewing greg.ewing at canterbury.ac.nz
Tue May 28 20:23:14 EDT 2019

Terry Reedy wrote:
> I believe that the situation is or can be thought of as this: there is 
> exactly 1 function locals dict.  Initially, it is empty and inaccessible 
> (unusable) from code.  Each locals() call updates the dict to a current 
> snapshot and returns it.

Yes, I understand *what's* happening, but not *why* it was designed
that way. Would it really be probihitively expensive to create a
fresh dict each time?


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