code: def lcl(pressure, temperature, dewpt, max_iters=50, eps=1e-5):
      r
      def _lcl_iter(p, p0, w, t):
          td = dewpoint(vapor_pressure(units.Quantity(p, pressure.units), w))
          return (p0 * (td / t) ** (1. / mpconsts.kappa)).m
  
      w = mixing_ratio(saturation_vapor_pressure(dewpt), pressure)
      fp = so.fixed_point(_lcl_iter, pressure.m, args=(pressure.m, w, temperature),
                          xtol=eps, maxiter=max_iters)
      lcl_p = fp * pressure.units
      return lcl_p, dewpoint(vapor_pressure(lcl_p, w))
docs: r"""Calculate the lifted condensation level (LCL) using from the starting point.
  
      The starting state for the parcel is defined by `temperature`, `dewpt`,
      and `pressure`.
  
      Parameters
      ----------
      pressure : `pint.Quantity`
          The starting atmospheric pressure
      temperature : `pint.Quantity`
          The starting temperature
      dewpt : `pint.Quantity`
          The starting dew point
  
      Returns
      -------
      `(pint.Quantity, pint.Quantity)`
          The LCL pressure and temperature
  
      Other Parameters
      ----------------
      max_iters : int, optional
          The maximum number of iterations to use in calculation, defaults to 50.
      eps : float, optional
          The desired relative error in the calculated value, defaults to 1e-5.
  
      See Also
      --------
      parcel_profile
  
      Notes
      -----
      This function is implemented using an iterative approach to solve for the
      LCL. The basic algorithm is:
  
      1. Find the dew point from the LCL pressure and starting mixing ratio
      2. Find the LCL pressure from the starting temperature and dewpoint
      3. Iterate until convergence
  
      The function is guaranteed to finish by virtue of the `max_iters` counter.