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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 is_iterable(maybe_iter, unless=(string_types, dict)):
 """ Return whether ``maybe_iter`` is an iterable, unless it's an instance of one of the base class, or tuple of base classes, given in ``unless``. Example:: False True False True """

    try:
        iter(maybe_iter)
    except TypeError:
        return False
    return not isinstance(maybe_iter, unless)