Kent Johnson wrote:
> David Bear wrote:
>
>>I'm attempting to use the cgi module with code like this:
>>
>>import cgi
>>fo = cgi.FieldStorage()
>># form field names are in the form if 'name:part'
>>keys = fo.keys()
>>for i in keys:
>> try:
>> item,value=i.split(':')
>> except NameError, UnboundLocalError:
>> print "exception..."
>> item,value=(None,None)
>>return(item,value)
>>
>>However, the except block does not seem to catch the exception and an
>>unboundlocalerror is thrown anyway. What am I missing?
>>
>
> I don't know why you would get an UnboundLocalError from the above code,
> but the correct syntax is
> except (NameError, UnboundLocalError):
One possibility is that there are no keys. Then the loop finishes
without ever setting item or values. This would give an unbound local
error. I assume that the OP would have noticed that in the traceback,
but perhaps he missed it.
OT, using i for the field namelike that makes my head hurt. Perhaps "for
fieldname in fo.keys():" would be in order instead.
Regards,
-tim
>
> Your code is binding the actual exception to the name "UnboundLocalError"
>
> Kent
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