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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 group(iterable, key=lambda ele: ele):
 """ Groups an iterable by a specified attribute, or using a specified key access function. Returns tuples of grouped elements. [(Dog('gatsby', 'Rruff!', 15), Dog('edward', 'hi', 15)), (Dog('william', 'roof', 12), )] :param iterable: iterable to be grouped :param key: a key-access function or attr name to be used as a group key """

    if callable(key):
        return _group(iterable, key)
    else:
        return _group(iterable, make_key_fn(key))