Usefulness of subclassing builtin number types

[Skip Montanaro]

    > And I want (of course) that this subclassing is 'sticky', so if I do a:
    >     x = MyInt(25)
    >     x *= 2

    > I want 'x' to stay of the class MyInt.

This works for me:

    class MyInt(int):
        def __imul__(self, other):
            return MyInt(self*other)

    x = MyInt(25)
    x *= 2
    print type(x), x

-- 
Skip Montanaro - skip at pobox.com
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