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Fri Oct 5 15:01:02 CEST 2012 · https://mail.python.org/pipermail/python-dev/2012-October/122102.html

On 10/05/2012 01:59 PM, Devin Jeanpierre wrote:
> I've never understood why locals() returned a mutable dictionary
> either, except that Python has no immutable dictionary type.

Ah, but these days it has types.MappingProxyType which provides a 
read-only wrapper around another mapping type.  Perhaps that should be 
employed here.

//arry/
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[Python-Dev] Should vars() return modifiable dict?