except clause not catching IndexError

[Erwin S. Andreasen]

Derek Schuff <dschuff at purdue.edu> writes:

> I have some code like this:

[...]

>                 except IndexError: #happens if theres a partial line at the end of file
>                     print "indexerror"
>                     break
>
> However, when I run it, it seems that I'm not catching the IndexError:
> Traceback (most recent call last):
>   File "/home/dschuff/bin/speeds.py", line 202, in ?
>     if int(toks[2],16) == qaddrs[i]+0x1000 and toks[0] == "200": #producer
> write
> IndexError: list index out of range

Did you by any chance do something like:

except ValueError, IndexError:

at some point earlier in this function? That, when catching ValueError
assigns the resulting exception to IndexError (and so the following
except IndexError: wouldn't work as IndexError is no longer what you
think it is). The correct syntax for catching multiple exceptions is:

except (ValueError, IndexError), targetVariable:

You could verify this by doing a print repr(IndexError) before your
line 202, to see that it really is the IndexError builtin.



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