try: finally: question

[djw]

Peter Hansen wrote:

> djw wrote:
> 
>> I have a question regarding the "proper" use of try: finally:... Consider
>> some code like this:
>> [...]
>> When I run this code, and an Error is raised, I get traceback (which I
>> don't want) and the program terminates (which I don't want).
> 
> I'm sorry if I misinterpret what you want, but it sounds like you
> need nothing more than an enclosing try/except.
> 
> d = Device.open()
> try:
>     try:
>          d.someMethodThatCanRaiseError(...)
>          if SomeCondition:
>                  raise Error # Error is subclass of Exception
>          d.someMethodThatCanRaiseError(...)
>          ... lots of other methods on d that can raise Error
>     finally:
>          d.close()
> except:
>     # whatever you want here
> 
> 
> Is anything wrong with that?

OK, yeah, I think you are correct. What wasn't apparent to me is that a
finally: doesn't stop the exception from continuing to propagate. I just
wish you could intermix except: and finally: within the same try: block.

Thanks,

Don