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Fri Feb 17 14:30:14 CET 2006 · https://mail.python.org/pipermail/python-dev/2006-February/061224.html

Martin v. Löwis wrote:
> Josiah Carlson wrote:
>> I would agree that zip is questionable, but 'uu', 'rot13', perhaps 'hex',
>> and likely a few others that the two of you may be arguing against
>> should stay as encodings, because strictly speaking, they are defined as
>> encodings of data.  They may not be encodings of _unicode_ data, but
>> that doesn't mean that they aren't useful encodings for other kinds of
>> data, some text, some binary, ...
> 
> To support them, the bytes type would have to gain a .encode method,
> and I'm -1 on supporting bytes.encode, or string.decode.
> 
> Why is
> 
> s.encode("uu")
> 
> any better than
> 
> binascii.b2a_uu(s)

The .encode() and .decode() methods are merely convenience
interfaces to the registered codecs (with some extra logic to
make sure that only a pre-defined set of return types are allowed).
It's up to the user to use them for e.g. UU-encoding or not.

The reason we have codecs for UU, zip and the others is that
you can use their StreamWriters/Readers in stackable streams.

Just because some codecs don't fit into the string.decode()
or bytes.encode() scenario doesn't mean that these codecs are
useless or that the methods should be banned.

-- 
Marc-Andre Lemburg
eGenix.com

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PEP 332 revival in coordination with pep 349?]