[issue17973] '+=' on a list inside tuple both succeeds and raises an exception

[Andy Chugunov]

Andy Chugunov added the comment:

Thank you for the clarification! The exception is appropriate as tuples have to stay immutable. Got it.

Could you please also explain a bit about the append() call? Should it in theory raise an exception as well or is such clean behavior intended?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17973>
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