code: def between(self, low, high):
          
          newq = self.copy()
          newq.setOp(Query.Op.Between)
          newq.setValue((low, high))
          return newq
docs: Sets the operator type to Query.Op.Between and sets the
          value to a tuple of the two inputted values.
          
          :param      low | <variant>
          :param      high | <variant>
          
          :return     <Query>
          
          :usage      |>>> from orb import Query as Q
                      |>>> query = Q('test').between(1,2)
                      |>>> print query
                      |test between [1,2]