Exceptions

[Tetsuo]

Okay, DBForums and Google show different replies. Praise the Usenet.

I can't figure out what you guys are telling me. I still can't figure
out how to do what I want with Bjorn Pettersen's explanation. All I know
so far is how to raise an exception by creating a program whose only
merit is to raise an exception. Hello World is more useful.

Here's my latest exploit.


class CorruptHardDiskError(Exception):
    pass
    def Pythagoras(a,b):
        if type(a) != type(0) or type(b) != type(0):
            raise CorruptHardDiskError
        else:
            print (a**2 + b**2)**(1/2)

try:
    CorruptHardDiskError.Pythagoras(18, "x")
except CorruptHardDiskError:
    print "Not a number!"


Oh, this raises an exception alright. But it's the wrong kind. Why? And
what does it mean?


Traceback (most recent call last):
  File "D:\Python22\Lib\site-packages\Pythonwin\pywin\framework\scriptu-
  tils.py", line 301, in RunScript
    exec codeObject in __main__.__dict__
  File "D:\Python22\Lib\My stuff\excepttest.py", line 10, in ?
    CorruptHardDiskError.Pythagoras(18, "x")
TypeError: unbound method Pythagoras() must be called with
CorruptHardDiskError instance as first argument (got int instance
instead)

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