[issue40911] Unexpected behaviour for += assignment to list inside tuple

[Adam Cmiel]

Adam Cmiel <acmiel1 at gmail.com> added the comment:

Got it, I didn't realize that the last step of augmented assignment is (in this case) assigning the result of __iadd__ back to the tuple.

Thanks for the explanations!

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40911>
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