Use kwargs 5

tzis/tzis.py

@@ -34,7 +34,7 @@ class Tzis():
         #if type(mf) != list and type(mf) != str :
         #    raise ValueError("Dataset '{0}' must either be a string or a list of strings")
         if mf:
-            return xarray.open_mfdataset(mf,
+            self.mf_dset = xarray.open_mfdataset(mf,
                                  decode_cf=True,
                                  use_cftime=True,
                                  concat_dim="time",
@@ -42,6 +42,7 @@ class Tzis():
                                  coords='minimal', 
                                  compat='override',
                                  **xarray_kwargs)
+            return self.mf_dset
         return None
     
     def _get_varname(self,