A Rational Numbers Implementation as an Example For `gf`
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The following text is taken from :mod:`gf.examples.rational`'s inline documenation.

.. automodule:: rational
    :members: gcd, Rational, __init__, __float__, __out__, __spy__, 
              __add__, __sub__, __mul__, __div__, __neg__,
              __eq__, __ne__, __lt__, __le__, __gt__, __ge__