[issue43838] There is a way to access an underlying mapping in MappingProxyType

[Nick Coghlan]

Nick Coghlan <ncoghlan at gmail.com> added the comment:

That resolution makes sense to me as well.

Should we make a note in the documentation for https://docs.python.org/3/library/types.html#types.MappingProxyType that the "read-only" protection is to guard against *accidental* modification, not against active attempts to subvert the protection?

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<https://bugs.python.org/issue43838>
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