code: def prior_omega_m(self, omega_m, omega_m_min=0, omega_m_max=1):
          
          if omega_m < omega_m_min or omega_m > omega_m_max:
              penalty = -10**15
              return penalty, False
          else:
              return 0, True
docs: checks whether the parameter omega_m is within the given bounds
          :param omega_m:
          :param omega_m_min:
          :param omega_m_max:
          :return: