code: def pack_tuple(self, values):
          
          assert isinstance(values, (tuple, list))
          cardinality = [struct_L.pack(len(values))]
          packed_items = [self.pack_field(v) for v in values]
          return b''.join(itertools.chain(cardinality, packed_items))
docs: Pack tuple of values
          <tuple> ::= <cardinality><field>+
  
          :param value: tuple to be packed
          :type value: tuple of scalar values (bytes, str or int)
  
          :return: packed tuple
          :rtype: bytes