[Tutor] finally

[Christopher King]

i mean isn't handled

On Thu, Jun 24, 2010 at 9:12 AM, Christopher King <g.nius.ck at gmail.com>wrote:

> you mean it will always run even if the exception is handled?
>
>
> On Thu, Jun 24, 2010 at 9:06 AM, Hugo Arts <hugo.yoshi at gmail.com> wrote:
>
>> On Thu, Jun 24, 2010 at 4:36 AM, Christopher King <g.nius.ck at gmail.com>
>> wrote:
>> >     In a try except clause, you can end with finally block. I know it
>> runs
>> > after the try and except blocks regardless of the outcome, but why use
>> it.
>> > Couldn't you just put the code after the try and except block without
>> using
>> > a finally block. Does the finally command do something I don't know
>> about.
>> > Does it make your program more understandable in some way?
>>
>> The thing about the finally block is that it *always* runs. If you
>> just put some code after the try: except: clause, it won't run if
>>
>> a) the exception is not handled in the try: except: block, but higher
>> up in the call stack
>> b) the exception is not handled at all
>> c) the exception handler terminates the program
>> d) the exception handler raises another exception
>>
>> If you need to do some cleanup, putting it in a finally block is the
>> only way to *guarantee* it will run.
>>
>> Hugo
>>
>
>
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