convert class form matlab to python

[poster]

I am new in python and trying to convert the following code from Matlab to python (I have problem with the class definition here)

in matlab:

classdef TGrid < handle



properties

  % properties common for all grids  

  NzEarth % number of Earth layers

  Nza     % number of air layers

end



methods



    %set airLayers for the grid

    function obj = setAirLayers(obj,varargin)



      Method = 'fixed height';   % OPTIONS: mirror, Fixed Height, Read From File

      MaxHeight = 10^6 ;  %   Fixed height of top 

      nzAir = 15 ;   %    number of layers

      InputFile = [];



      n = length(varargin);

      if mod(n,2)

        error('Arguments must occur in pairs')

      end

      for k = 1:2:n

        option = lower(varargin{k});

        switch option

            case 'method'

                Method = lower(varargin{k+1});

                nzAir = 10;

            case 'maxheight'

                MaxHeight = varargin{k+1};

            case 'nlayers'

                nzAir = varargin{k+1};

            case 'inputfile'

                InputFile = varargin{k+1};

        end

      end



      switch Method

        case 'mirror'



            dzAir = obj.Dz(obj.Nza+1:obj.Nza+nzAir).*(3.^(0:nzAir-1))';



        case 'fixed height'

            z1_log = log10(obj.Dz(1));

            dlogz = (log10(MaxHeight)-z1_log)/(nzAir);

            z = 10.^(z1_log:dlogz:log10(MaxHeight));

            dzAir = diff(z);

        case 'read from file'

            fid = fopen(InputFile);

            [dzAir,nzAir] = fscanf(fid,'%f','inf');

      end

      [n,~] = size(dzAir);

      if n == 1

        dzAir = dzAir.';

      end

      obj.Nza = nzAir;

      obj.Dz = [dzAir(end:-1:1) ; obj.Dz];

      obj.Nz = length(obj.Dz);

      obj.dualLengths;

      obj.setIndices;

    end % setAirLayers      





    end     % methods

end    % classdef

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