[New-bugs-announce] [issue5882] __repr__ is ignored when formatting exceptions

[Jonathan Ellis]

New submission from Jonathan Ellis <ellisj at users.sourceforge.net>:

The docs say that "If a class defines __repr__() but not __str__(), then
__repr__() is also used when an “informal” string representation of
instances of that class is required."

but, repr is ignored:
>>> class E(Exception):
...     def __repr__(self):
...         return 'fancy!'
...
>>> raise E()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
__main__.E

only str is respected:
>>> class E(Exception):
...     def __str__(self):
...         return 'fancy!'
...
>>> raise E()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
__main__.E: fancy!

----------
components: Interpreter Core
messages: 86826
nosy: ellisj
severity: normal
status: open
title: __repr__ is ignored when formatting exceptions
type: behavior
versions: Python 2.6

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue5882>
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