How to use the sunpy.Grid.__init__ function in sunpy

def __init__(self,x,y,z,cells,nfaces,mask,method='nearest',grdfile=None):
        
        self.method=method
        # Initialise the trisearch array
        GridSearch.__init__(self,x,y,cells,nfaces=nfaces,force_inside=True)

        if self.method == 'linear':
            Grid.__init__(self,grdfile)
	    self.datatmp = np.zeros(mask.shape,dtype=np.double)
        
        self.z = np.sort(z)
        self.z[-1]=10.0 # Set the surface layer to large
        self.Nkmax = z.size-1
        
        self.mask3d = mask
        
        self.maskindex = -1*np.ones(self.mask3d.shape,dtype=np.int32)
        rr=0
        for ii in range(self.mask3d.shape[0]):
            for jj in range(self.mask3d.shape[1]):
                if self.mask3d[ii,jj]:
                    self.maskindex[ii,jj]=rr
                    rr+=1

def __init__(self,suntanspath,basename,numprocs,outvars=None):
        tic=time.clock()
        
        print '########################################################'
        print '     Initializing python SUNTANS NetCDF joining script...'
        print '########################################################'
        
        # Step 1) Read the main grid
        #print 'Loading suntans grid points...'
        Grid.__init__(self,suntanspath)

        self.numprocs = numprocs
        self.suntanspath=suntanspath
        self.basename=basename
    
        # Step 2) Build a dictionary of the variable names, attributes and dimensions in the first ncfile
        proc=0
        self.ncfile='%s/%s.%d'%(suntanspath,basename,proc)
        
        self.variables, self.dims, self.globalatts = nc_info(self.ncfile)

        # If outvars have been set only write those variables and the grid variables
        if not outvars==None:
            self.outvars=gridvars+outvars
            self.outvars=outvars
            newvariables = [vv for vv in self.variables if vv['Name'] in self.outvars]

def __init__(self,suntanspath,**kwargs):
        
        self.__dict__.update(kwargs)
        Grid.__init__(self,suntanspath)
        
        # Initialise the trisearch object
        self.tsearch =  TriSearch(self.xp,self.yp,self.cells)

def on_load_grid(self, event):
        
        dlg = wx.DirDialog(
            self, 
            message="Open SUNTANS grid from folder...",
            defaultPath=os.getcwd(),
            style= wx.DD_DEFAULT_STYLE)
        
        if dlg.ShowModal() == wx.ID_OK:
            path = dlg.GetPath()

            # Initialise the class
            self.flash_status_message("Opening SUNTANS grid from folder: %s" % path)
            Grid.__init__(self,path)

            # Plot the Grid
            self.axes,self.collection = self.plotmesh(ax=self.axes,edgecolors='y')

            # redraw the figure
            self.canvas.draw()

def __init__(self,suntanspath,timestep,**kwargs):
        
        self.__dict__.update(**kwargs)
        
        self.suntanspath = suntanspath
        
        Grid.__init__(self,suntanspath)
        
        # Get the time timestep
        self.time = datetime.strptime(timestep,'%Y%m%d.%H%M%S')
        
        # Initialise the output array
        self.initArrays()

def __init__(self,ncfile):
        self.ncfile=ncfile
        Grid.__init__(self,ncfile,gridvars=untrim_gridvars,griddims=untrim_griddims)