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To: python-list@python.org
From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: Why does unicode-escape decode escape symbols that are already escaped?
Date: Sun, 10 May 2015 13:00:52 -0400
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On 5/10/2015 11:53 AM, Somelauw . wrote:
> In Python 3, decoding "=E2=82=AC" with unicode-escape returns '=C3=A2\x=
82=C2=AC' which in
> my opinion doesn't make sense.

Agreed. I think this is a bug in that it should raise an exception=20
instead. Decoding a string only makes sense for rot-13

> The =E2=82=AC already is decoded; if it were encoded it would look like=
 this:
> '\u20ac'.
> So why is it doing this?

> $ python3 -S
> Python 3.3.3 (default, Nov 27 2013, 17:12:35)
> [GCC 4.8.2] on linux
>  >>> import codecs
>  >>> codecs.decode('=E2=82=AC', 'unicode-escape')
> '=C3=A2\x82=C2=AC'
>  >>> codecs.encode('=E2=82=AC', 'unicode-escape')
> b'\\u20ac'

--=20
Terry Jan Reedy