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5.19.2 Subclassing Repr Objects

The use of dynamic dispatching by `Repr.repr1()` allows subclasses of `Repr` to add support for additional built-in object types or to modify the handling of types already supported. This example shows how special support for file objects could be added:

    import repr
    import sys

    class MyRepr(repr.Repr):
        def repr_file(self, obj, level):
            if obj.name in ['<stdin>', '<stdout>', '<stderr>']:
                return obj.name
            else:
                return `obj`

    aRepr = MyRepr()
    print aRepr.repr(sys.stdin)          # prints '<stdin>'