Marc-Andre Lemburg <m...@egenix.com> added the comment:
On 23.09.2020 16:49, STINNER Victor wrote:
>
> STINNER Victor <vstin...@python.org> added the comment:
>
>> Just found an internal API which already takes care of
>> unregistering a search function: _PyCodec_Forget().
>>
>> All that needs to be done is to expose this as codecs.unregister()
>> and add the clearing of the lookup cache.
>
> Yeah, I saw this function, but it's related to the cache, not to the list of
> search functions.
Ah, right. I just looked at the first occurance of codec_search_path :-)
>> 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.
>
> I didn't hear anyone (ok, apart you) who requested to order search functions.
This has come up in the past from people who wanted to override
builtin codecs with their own versions.
> I dislike the idea of exposing it, since it introduces the risk that someone
> "unregisters" a search function simply by removing it from the list, without
> invalidating the cache.
>
> I prefer to hide the internals to ensure that the cache remains consistent.
Sure, a function would merely return a tuple with the entries,
not the list itself, e.g. in pseudo code:
def get_search_path():
return tuple(interp->codec_search_path)
For replacing the vanilla setup, this is not needed, since only
one search function gets registered (the builtin one), so rather
low priority, I guess.
--
Marc-Andre Lemburg
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