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Wed Sep 20 20:07:51 CEST 2006 · https://mail.python.org/pipermail/python-dev/2006-September/068867.html

On 9/20/06, Thomas Heller <theller at python.net> wrote:
>
> Is it an oversight that exception instances do no longer support
> slicing in Python 2.5?
>
> This code works in 2.4, but no longer in 2.5:
>
> try:
>     open("", "r")
> except IOError, details:
>     print details[:]

Technically, yes.  There is no entry in the sq_slice field for the
PySequenceMethods struct.  Although you can get to the list of arguments by
going through the 'args' attribute if you need a quick fix.

I have a fix in my checkout that I will check into the trunk shortly and
into 25-maint as soon as Anthony unfreezes it.

-Brett
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[Python-Dev] Exceptions and slicing