[Python-3000] removing exception .args

[Georg Brandl]

Andrew Dalke schrieb:
> Posting here a expansion of a short discussion I had
> after Guido's keynote at EuroPython.  In this email
> I propose eliminating the ".args" attribute from the
> Exception type.  It's not useful, and supporting it
> correctly is complicated enough that it's often not
> supported correctly
> 
> 
> 
> In Python 2 the base Exception class works like this
> 
>  >>> x = Exception("spam", "was", "here")
>  >>> x[0]
> 'spam'
>  >>> x.args
> ('spam', 'was', 'here')
>  >>>
> 
> In Py3K the [0] index lookup disappears.  This is a
> good thing.  Positional lookup like this is rarely useful.
> 
> The .args attribute remains.  I don't see the need for
> it and propose that it be removed in Py3K.

Hm, I always found it useful to just do

class MyCustomError(Exception):
     pass

and give it arbitrary arguments to it without writing __init__
method stuff that I can access from outside.

Georg


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