code: def relative_humidity_wet_psychrometric(dry_bulb_temperature, web_bulb_temperature,
                                          pressure, **kwargs):
      r
      return (psychrometric_vapor_pressure_wet(dry_bulb_temperature, web_bulb_temperature,
                                               pressure, **kwargs)
              / saturation_vapor_pressure(dry_bulb_temperature))
docs: r"""Calculate the relative humidity with wet bulb and dry bulb temperatures.
  
      This uses a psychrometric relationship as outlined in [WMO8-2014]_, with
      coefficients from [Fan1987]_.
  
      Parameters
      ----------
      dry_bulb_temperature: `pint.Quantity`
          Dry bulb temperature
      web_bulb_temperature: `pint.Quantity`
          Wet bulb temperature
      pressure: `pint.Quantity`
          Total atmospheric pressure
  
      Returns
      -------
      `pint.Quantity`
          Relative humidity
  
      Notes
      -----
      .. math:: RH = \frac{e}{e_s}
  
      * :math:`RH` is relative humidity as a unitless ratio
      * :math:`e` is vapor pressure from the wet psychrometric calculation
      * :math:`e_s` is the saturation vapor pressure
  
      See Also
      --------
      psychrometric_vapor_pressure_wet, saturation_vapor_pressure