code: def _param_bounds(self, gamma, q):
          
          if gamma < 1.4:
              gamma = 1.4
          if gamma > 2.9:
              gamma = 2.9
          if q < 0.01:
              q = 0.01
          return float(gamma), q
docs: bounds parameters
  
          :param gamma:
          :param q:
          :return: