On Sun, Jun 8, 2014 at 12:02 PM, Ian Kelly <ian.g.ke...@gmail.com> wrote:
> On Sun, Jun 8, 2014 at 11:57 AM, Joshua Landau <jos...@landau.ws> wrote:
>> On 8 June 2014 08:12, Marko Rauhamaa <ma...@pacujo.net> wrote:
>>>
>>> Does anyone have an example motivating a return from finally? It seems
>>> to me it would always be a bad idea as it silently clears all unexpected
>>> exceptions.
>>
>> In a general sense:
>>
>> try:
>> something_that_can_break()
>> return foo() # before clean_up
>> finally:
>> clean_up()
>> if default:
>> return default() # after clean_up()
>>
>> What's the best replacement? Note: I've never done this.
>
> Why not just move the default out of the finally block?
>
> try:
> something_that_can_break()
> return foo() # before clean_up
> finally:
> clean_up()
> if default:
> return default() # after clean_up()
Never mind, that doesn't work. But you could do this:
try:
something_that_can_break()
return foo() # before clean_up
except ExpectedException:
if default:
return default() # after clean_up()
else:
raise
finally:
clean_up()
And then anything unexpected will be propagated instead of silenced.
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