Future Warning with Negative Int

[brianlum@gmail.com]

Hi,

If I try to print a negative integer as a hexadecimal, I get the
following error:
FutureWarning: %u/%o/%x/%X of negative int will return a signed string
in Python 2.4 and up

For example:[color=blue][color=green][color=darkred]
>>> print "%X" % -1[/color][/color][/color]
__main__:1: FutureWarning: %u/%o/%x/%X of negative int will return a
signed string in Python 2.4 and up
FFFFFFFF

Does that mean that in the future it will say -1 or -FFFFFFFF? Also,
how do I suppress this warning?

Thanks,
Brian

[Peter Otten]

Re: Future Warning with Negative Int

brianlum@gmail. com wrote:
[color=blue]
> If I try to print a negative integer as a hexadecimal, I get the
> following error:[/color]
[color=blue][color=green][color=darkred]
>>>> print "%X" % -1[/color][/color]
> __main__:1: FutureWarning: %u/%o/%x/%X of negative int will return a
> signed string in Python 2.4 and up
> FFFFFFFF
>
> Does that mean that in the future it will say -1 or -FFFFFFFF?[/color]

The future is now:

$ python2.4 -c 'print "%X" % -1'
-1
[color=blue]
> Also, how do I suppress this warning?[/color]

With the -W option:

$ python2.3 -W ignore -c 'print "%X" % -1'
FFFFFFFF

or warnings.filter warnings('ignor e').

http://docs.python.org/lib/warning-functions.html

has more on the subject.

Peter