[issue8838] Remove codecs.readbuffer_encode() and codecs.charbuffer_encode()

[STINNER Victor]

STINNER Victor <victor.stinner at haypocalc.com> added the comment:

> readbuffer_encode() and charbuffer_encode() are not really encoder 
> nor related to encodings: they are related to PyBuffer

That was the initial problem: codecs is specific to encodings (in Python3), encodes str to bytes, and decodes bytes (or any read buffer) to str.

I don't like readbuffer_*encode* and *charbuffer_encode*  function names, because there are different than other codecs: they encode *bytes* to bytes (and not str to bytes). I think that these functions should be removed or moved somewhere else under a different name.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue8838>
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