[issue39963] Subclassing slice objects

[Mario de OOurtzborun]

New submission from Mario de OOurtzborun <qqkvxebebukvevrtwg at awdrt.org>:

Is there any reason why slice objects aren't subclassable? I want a mutable slice object, but there is no way to create one that will work with lists or tuples. And __index__ method requires to return int. I want to prepare a git merge request about this issue if there is no specific reason to forbid them becoming a base class.

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messages: 364143
nosy: mariode1
priority: normal
severity: normal
status: open
title: Subclassing slice objects

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39963>
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