[issue39963] Subclassing slice objects

[Terry J. Reedy]

Change by Terry J. Reedy :


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stage:  -> test needed
type:  -> enhancement
versions: +Python 3.9

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[issue39963] Subclassing slice objects

[Raymond Hettinger]

Change by Raymond Hettinger :


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nosy: +rhettinger

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[issue39963] Subclassing slice objects

[Mario de OOurtzborun]

New submission from Mario de OOurtzborun :

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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