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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 _product(*args, **kwds):
 """ Generates cartesian product of lists given as arguments From itertools.product documentation """


    pools = map(tuple, args) * kwds.get('repeat', 1)
    result = [[]]
    for pool in pools:
        result = [x+[y] for x in result for y in pool]
    return result