[issue21258] Add __iter__ support for mock_open

[Anthony Flury]

Anthony Flury <anthony.flury at btinternet.com> added the comment:

The lack of dunder_iter support on mock_open has been resolved in Issue 32933 (Git Hub 5974).

Can I suggest that once the above PR is merged into 3.8 (due imminently allegedly <smile>), that we should then backport that fix into 3.5, 3.6 & 3.7 as a minimum ?

I am by no means an expert though.

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nosy: +anthony-flury

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