[issue25597] unittest.mock does not wrap dunder methods (__getitem__ etc)

[Michael Foord]

Michael Foord <michael at voidspace.org.uk> added the comment:

The previous behaviour was unspecified and clearly due to missing functionality, so the advantages of fixing it outweigh any potential compatibility issues. But I'd see it as a feature enhancement for 3.9.

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<https://bugs.python.org/issue25597>
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