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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 to_vector(np_array):
 """Convert numpy array to MLlib Vector """

    if len(np_array.shape) == 1:
        return Vectors.dense(np_array)
    else:
        raise Exception("An MLLib Vector can only be created from a one-dimensional " +
                        "numpy array, got {}".format(len(np_array.shape)))