code: def validate_totalflux(totalflux):
      
      if totalflux <= 0.0:
          raise exceptions.SynphotError('Integrated flux is <= 0')
      elif np.isnan(totalflux):
          raise exceptions.SynphotError('Integrated flux is NaN')
      elif np.isinf(totalflux):
          raise exceptions.SynphotError('Integrated flux is infinite')
docs: Check integrated flux for invalid values.
  
      Parameters
      ----------
      totalflux : float
          Integrated flux.
  
      Raises
      ------
      synphot.exceptions.SynphotError
          Input is zero, negative, or not a number.