what to do when instance of class fails to initialize ?

[Fredrik Lundh]

Tom Van den Brandt wrote:

> If I have an __init__ for a class and the initialisation can't go through
> (example: missing or wrong arguments), how do I return an error to the
> caller (from main() function)?  When I do a return statement in the
> __init__ it says __init__ should return None...  I can stop the flow with
> raise 'BlahBlah'. But then the program exits.
>
> What is the nice way to do this ?

catch the exception:

    http://www.python.org/doc/current/tut/node10.html:
    http://www.python.org/doc/current/ref/try.html

</F>

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