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Groups > comp.lang.python > #31319
| Date | 2012-10-15 17:34 +0100 |
|---|---|
| From | MRAB <python@mrabarnett.plus.com> |
| Subject | Re: Exception Messages |
| References | <8b5cb95f-424b-45a8-b19b-42f92f531a75@googlegroups.com> <mailman.2217.1350317845.27098.python-list@python.org> <k5hd7c$emf$1@reader1.panix.com> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.2218.1350318893.27098.python-list@python.org> (permalink) |
On 2012-10-15 17:22, John Gordon wrote:
> In <mailman.2217.1350317845.27098.python-list@python.org> MRAB <python@mrabarnett.plus.com> writes:
>
>> > Why wasn't the message printed out?
>>
>> You didn't add a __str__ method:
>
>> class PvCamError(Exception):
>> def __init__(self, msg):
>> self.msg = msg
>> def __str__(self):
>> return self.msg
>
> Wouldn't PvCamError inherit __str__() from Exception?
>
Yes, but you've put the message in msg, and Exception doesn't have that
attribute.
An alternative approach would be:
class PvCamError(Exception):
pass
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Exception Messages Wanderer <wanderer@dialup4less.com> - 2012-10-15 09:00 -0700
Re: Exception Messages MRAB <python@mrabarnett.plus.com> - 2012-10-15 17:17 +0100
Re: Exception Messages John Gordon <gordon@panix.com> - 2012-10-15 16:22 +0000
Re: Exception Messages MRAB <python@mrabarnett.plus.com> - 2012-10-15 17:34 +0100
Re: Exception Messages Wanderer <wanderer@dialup4less.com> - 2012-10-15 10:18 -0700
Re: Exception Messages Wanderer <wanderer@dialup4less.com> - 2012-10-15 10:20 -0700
Re: Exception Messages Wanderer <wanderer@dialup4less.com> - 2012-10-15 10:20 -0700
Re: Exception Messages MRAB <python@mrabarnett.plus.com> - 2012-10-15 18:34 +0100
Re: Exception Messages Wanderer <wanderer@dialup4less.com> - 2012-10-15 10:44 -0700
Re: Exception Messages Wanderer <wanderer@dialup4less.com> - 2012-10-15 10:44 -0700
Re: Exception Messages Wanderer <wanderer@dialup4less.com> - 2012-10-15 10:18 -0700
Re: Exception Messages Dave Angel <d@davea.name> - 2012-10-15 12:42 -0400
Re: Exception Messages Terry Reedy <tjreedy@udel.edu> - 2012-10-15 15:15 -0400
Re: Exception Messages Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-16 00:47 +0000
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