Catching Exceptions.

[Jeremy Jones]

Keith Bolton wrote:

>I am handling exceptions currently using try, except.  Generally I don't
>handle specific exceptions and am catching all.
>Then if an exception occurs, I would like to capture that error string.
> However, in the documentation it seems like 
>there is not a way to get the extra str data if you are handling all
>exceptions and not specifically.  Is there?
>
>thanks
>
>-keith
>  
>
You want to specify the specific exception you want to handle like this:

 >>> f = {'a': 'b'}
 >>> f['b']
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
KeyError: 'b'
 >>> try:
...     print f['b']
... except KeyError:
...     print "You got a key error"
... except:
...     print "You got some other kind of exception than a KeyError"
...
You got a key error
 >>>

Just name the exception after the "except".  You can list a chain of 
"except <some_specific_exception>" followed by a generic "except" to 
handle any other type of exception you didn't mention.


Jeremy
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