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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 strip_hidden(key_tuples, visibilities):
 """Filter each tuple according to visibility. Args: key_tuples: A sequence of tuples of equal length (i.e. rectangular) visibilities: A sequence of booleans equal in length to the tuples contained in key_tuples. Returns: A sequence equal in length to key_tuples where the items are tuples with a length corresponding to the number of items in visibility which are True. """

    result = []
    for key_tuple in key_tuples:
        if len(key_tuple) != len(visibilities):
            raise ValueError(
                "length of key tuple {} is not equal to length of visibilities {}".format(
                    key_tuple, visibilities
                )
            )
        filtered_tuple = tuple(item for item, visible in zip(key_tuple, visibilities) if visible)
        result.append(filtered_tuple)
    return result