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gh-91181: drop support for bytes on sys.path (GH-31934)

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Support for bytes broke sometime between Python 3.2 and 3.6 and has been broken ever since. Trying to bring back supports is surprisingly difficult in the face of -b and checking for keys in sys.path_importer_cache. Since the support was broken for so long, trying to overcome the difficulty of bringing back the support has been deemed not worth it.

Co-authored-by: Eryk Sun <eryksun@gmail.com>
Co-authored-by: Brett Cannon <brett@python.org>
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Thomas Grainger 2022-07-17 02:07:53 +01:00 • committed by GitHub
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@ -800,10 +800,8 @@ environment variable and various other installation- and
implementation-specific defaults. Entries in :data:`sys.path` can name
directories on the file system, zip files, and potentially other "locations"
(see the :mod:`site` module) that should be searched for modules, such as
URLs, or database queries. Only strings and bytes should be present on
:data:`sys.path`; all other data types are ignored. The encoding of bytes
entries is determined by the individual :term:`path entry finders <path entry
finder>`.
URLs, or database queries. Only strings should be present on
:data:`sys.path`; all other data types are ignored.
The :term:`path based finder` is a :term:`meta path finder`, so the import
machinery begins the :term:`import path` search by calling the path