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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 raw_corpus_length_ratio(hypotheses: Iterable[str], references: Iterable[str]) -> float: """ Simple wrapper around length ratio implementation. :param hypotheses: Hypotheses stream. :param references: Reference stream. :return: Length ratio score as float. """

    ratios = [len(h.split())/len(r.split()) for h, r in zip(hypotheses, references)]
    return sum(ratios)/len(ratios) if len(ratios) else 0.0