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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 is_sequence(obj):
 """ Check if an object is a sequence or not. Parameters obj : object Any object type to be checked Returns is_sequence : bool True if object is sequence """

    seq = (not hasattr(obj, "strip") and
           hasattr(obj, "__getitem__") or
           hasattr(obj, "__iter__"))

    # check to make sure it is not a set, string, or dictionary
    seq = seq and all(not isinstance(obj, i) for i in (dict,
                                                       set,
                                                       basestring))

    # PointCloud objects can look like an array but are not
    seq = seq and type(obj).__name__ not in ['PointCloud']

    # numpy sometimes returns objects that are single float64 values
    # but sure look like sequences, so we check the shape
    if hasattr(obj, 'shape'):
        seq = seq and obj.shape != ()

    return seq