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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def ranseed(seed=None):
 """ Seed random number generators with tuple ``seed``. Argument ``seed`` is an integer or a :class:`tuple` of integers that is used to seed the random number generators used by :mod:`numpy` and :mod:`random` (and therefore by :mod:`gvar`). Reusing the same ``seed`` results in the same set of random numbers. ``ranseed`` generates its own seed when called without an argument or with ``seed=None``. This seed is stored in ``ranseed.seed`` and also returned by the function. The seed can be used to regenerate the same set of random numbers at a later time. Args: seed (int, tuple, or None):
 Seed for generator. Generates a random tuple if ``None``. Returns: The seed used to reseed the generator. """

    if seed is None:
        seed = numpy.random.randint(1, int(2e9), size=3)
    try:
        seed = tuple(seed)
    except TypeError:
        pass
    numpy.random.seed(seed)
    ranseed.seed = seed
    return seed