subclassing Exceptions

[Tim Peters]

[phawkins at spamnotconnact.com]
> ...
> import exceptions
> ...
> class CameraError(exceptions.Exception):
>     def __init__ (self, args = None):
>         self.args = args

Just noting that Exception is in the builtin namespace, so there's no need
to import the exceptions module first.  That is, you can drop the import,
and change the declaration to

    class CameraError(Exception):

i-was-surprised-too-when-barry-taught-me-that!-ly y'rs  - tim