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Mon Feb 20 22:31:13 CET 2012 · https://mail.python.org/pipermail/python-dev/2012-February/116676.html

On 2/20/2012 1:33 PM, antoine.pitrou wrote:
> http://hg.python.org/cpython/rev/c760bd844222
> changeset:   75058:c760bd844222
> user:        Antoine Pitrou<solipsis at pitrou.net>
> date:        Mon Feb 20 19:30:23 2012 +0100
> summary:
>    Issue #13641: Decoding functions in the base64 module now accept ASCII-only unicode strings.
> Patch by Catalin Iacob.

> +        tests = {b"d3d3LnB5dGhvbi5vcmc=": b"www.python.org",
> +                 b'AA==': b'\x00',
> +                 b"YQ==": b"a",
> +                 b"YWI=": b"ab",
> +                 b"YWJj": b"abc",
> +                 b"YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXpBQkNE"
> +                 b"RUZHSElKS0xNTk9QUVJTVFVWV1hZWjAxMjM0\nNT"
> +                 b"Y3ODkhQCMwXiYqKCk7Ojw+LC4gW117fQ==":
> +
> +                 b"abcdefghijklmnopqrstuvwxyz"
> +                 b"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
> +                 b"0123456789!@#0^&*();:<>,. []{}",
> +                 b'': b'',
> +                 }
> +        for data, res in tests.items():

I am a little puzzled why a constant sequence of pairs is being stored 
as a mapping instead of a tuple (or list) of 2-tuples (which is compiled 
more efficiently). As near as I can tell, 'tests' and similar constructs 
later in the file are never used as mappings. Am I missing something or 
is this just the way Catalin wrote it?

--
Terry Jan Reedy

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[Python-Dev] [Python-checkins] cpython: Issue #13641: Decoding functions in the base64 module now accept ASCII-only