[issue6108] unicode(exception) behaves differently on Py2.6 when len(exception.args) 1

2009-09-16 Thread Georg Brandl 

Changes by Georg Brandl ge...@python.org:


--
priority: high - release blocker

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[issue6108] unicode(exception) behaves differently on Py2.6 when len(exception.args) 1

2009-09-13 Thread Antoine Pitrou 

Antoine Pitrou pit...@free.fr added the comment:

Looks like a potentially annoying bug to me.

--
nosy: +pitrou
priority:  - high
stage:  - needs patch
versions: +Python 2.7

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[issue6108] unicode(exception) behaves differently on Py2.6 when len(exception.args) 1

2009-09-12 Thread Chris Rebert 

Changes by Chris Rebert pyb...@rebertia.com:


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nosy: +cvrebert

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[issue6108] unicode(exception) behaves differently on Py2.6 when len(exception.args) 1

2009-09-12 Thread Jean-Paul Calderone 

Jean-Paul Calderone exar...@divmod.com added the comment:

Perhaps also worth noting is that in Python 2.4 as well, str(exception)
and unicode(exception) returned the same thing.  Unlike some other
exception changes in 2.6, this doesn't seem to be a return to older
behavior, but just a new behavior.  (Or maybe no one cares about that;
just wanted to point it out, though.)

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nosy: +exarkun

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[issue6108] unicode(exception) behaves differently on Py2.6 when len(exception.args) 1

2009-05-25 Thread Ezio Melotti 

New submission from Ezio Melotti ezio.melo...@gmail.com:

On Python 2.5 str(exception) and unicode(exception) return the same text:
 err
UnicodeDecodeError('ascii', '\xc3\xa0', 0, 1, 'ordinal not in range(128)')
 str(err)
'ascii' codec can't decode byte 0xc3 in position 0: ordinal not in
range(128)
 unicode(err)
u'ascii' codec can't decode byte 0xc3 in position 0: ordinal not in
range(128)

On Python 2.6 unicode(exception) returns unicode(exception.args):
 err
UnicodeDecodeError('ascii', '\xc3\xa0', 0, 1, 'ordinal not in range(128)')
 str(err)
'ascii' codec can't decode byte 0xc3 in position 0: ordinal not in
range(128)
 unicode(err)
u('ascii', '\\xc3\\xa0', 0, 1, 'ordinal not in range(128)')

This seems to affect only exceptions with more than 1 arg (e.g.
UnicodeErrors and SyntaxErrors). KeyError is also different (the '' are
missing with unicode()).

Note that when an exception like ValueError() is instantiated with more
than 1 arg even str() returns str(exception.args) on both Py2.5 and Py2.6.

Probably __str__() checks the number of args before returning a specific
message and if it doesn't match it returns str(self.args). __unicode__()
instead seems to always return unicode(self.args) on Py2.6.

Attached there's a script that prints the repr(), str() and unicode() of
some exceptions, run it on Py2.5 and Py2.6 to see the differences.

--
components: Interpreter Core
files: unicode_exceptions.py
messages: 88330
nosy: ezio.melotti
severity: normal
status: open
title: unicode(exception) behaves differently on Py2.6 when len(exception.args) 
 1
type: behavior
versions: Python 2.6
Added file: http://bugs.python.org/file14071/unicode_exceptions.py

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