[issue41842] Add codecs.unregister() to unregister a codec search function

[Marc-Andre Lemburg]

Marc-Andre Lemburg <mal at egenix.com> added the comment:

On 23.09.2020 14:56, STINNER Victor wrote:
> Marc-Andre Lemburg explained:
> 
> "There is no API to unregister a codec search function, since deregistration
> would break the codec cache used by the registry to speedup codec
> lookup."
> 
> One simple solution would be to clear the cache (PyInterpreterState.codec_search_cache) when codecs.unregister() removes a search function. I expect that calling unregister() is an uncommon operation, so the performance is not a blocker issue.

+1

BTW: While you're at it, having a way to access the search function
list from Python would be nice as well, since this would then open
up the possibility to reorder search functions.

-- 
Marc-Andre Lemburg
eGenix.com

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