subclassing Exceptions

[Erik Max Francis]

Sheila King wrote:

> That's because the "big picture" is the general overview of how the
> parent class works.

The behavior of the parent class is as the library reference states:  It
implements __str__, __getitem__, __len__ (presumably), and args. 
Exception is just a class like everything else; other than having the
behavior as specified in the reference, it's your typical class.

-- 
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