[issue7475] codecs missing: base64 bz2 hex zlib hex_codec ...

[STINNER Victor]

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

> *.encode('rot_13') ==> CodecLookupError

I like the idea of raising a lookup error on .encode/.decode if the codec is not a classic text codec (like ASCII or UTF-8).

> *.transform('ascii') ==> CodecLookupError

Same comment.

> str.transform('bz2') ==> CodecLookupError

A lookup error is surprising here. It may be a TypeError instead. The bz2 can be used with .transform, but not on str. So:

 - Lookup error if the codec cannot be used with encode/decode or transform/untransform
 - Type error if the value type is invalid

(CodecLookupError doesn't exist, you propose to define a new exception who inherits from LookupError?)

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue7475>
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