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Sun Apr 9 17:20:01 CEST 2006 · https://mail.python.org/pipermail/python-dev/2006-April/063562.html

Go ahead and fix it. This was probably never changed since 1990 or
so... Do expect some code brakage where people rely on the old
behavior. :-(

--Guido

On 4/9/06, Thomas Wouters <thomas at python.org> wrote:
>
> Someone on IRC (who refuses to report bugs on sourceforge, so I guess he
> wants to remain anonymous) came with this very amusing bug: int(), when
> raising ValueError, doesn't quote (or repr(), rather) its arguments:
>
>  >>> int("")
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> ValueError: invalid literal for int():
> >>> int("34\n\n\n5")
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> ValueError: invalid literal for int(): 34
>
>
> 5
> >>>
>
> Unicode behaviour also isn't always consistent:
> >>> int(u'\u0100')
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> UnicodeEncodeError: 'decimal' codec can't encode character u'\u0100' in
> position 0: invalid decimal Unicode string
> >>> int(u'\u09ec', 6)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> ValueError: invalid literal for int(): 6
>
> And trying to use the 'decimal' codec directly:
> >>> u'6'.encode('decimal')
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> LookupError: unknown encoding: decimal
>
> I'm not sure if the latter problems are fixable, but the former should be
> fixed by passing the argument to ValueError through repr(), I think. It's
> also been suggested (by the reporter, and I agree) that the actual base
> should be in the errormessage too. Is there some reason not to do this that
> I've overlooked?
>
> --
> Thomas Wouters <thomas at python.org>
>
> Hi! I'm a .signature virus! copy me into your .signature file to help me
> spread!
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--
--Guido van Rossum (home page: http://www.python.org/~guido/)

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[Python-Dev] int()'s ValueError behaviour