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Wed Aug 25 10:32:41 CEST 2004 · https://mail.python.org/pipermail/python-dev/2004-August/048360.html

Martin v. Löwis wrote:
> Walter Dörwald wrote:
> 
>> If a tuple is passed and returned this makes it possible
>> from Python code to mangle the state. IMHO this should be
>> avoided if possible.
> 
> Not necessarily. We are all consenting adults. So if the
> code checks whether the state is sane, from a typing point
> of view, i.e. if you can't crash the interpreter, then there
> is no need to hide the state from the user.

Martin, there are two reasons for hiding away these details:

1. we need to be able to change the codec state without
    breaking the APIs

2. we don't want the state to be altered by the user

A single object serves this best and does not create
a whole plethora of new APIs in the _codecs module.
This is not over-design, but serves a reason.

Thanks,
-- 
Marc-Andre Lemburg
eGenix.com

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[Python-Dev] Decoding incomplete unicode