fix l2 dir setting

Author: hgloeckner

src/halodrops/processor.py

@@ -880,9 +880,9 @@ def add_compression_and_encoding_properties(
 
         for var in self._interim_l2_ds.data_vars:
             if not encoding_variables.get(var):
-                self._interim_l2_ds[var].encoding = (
-                    default_variable_compression_properties
-                )
+                self._interim_l2_ds[
+                    var
+                ].encoding = default_variable_compression_properties
 
         return self
 
@@ -962,7 +962,7 @@ def add_l2_ds(self, l2_dir: str = None):
             Returns the sonde object with the L2 dataset added as an attribute.
         """
         if l2_dir is None:
-            self.l2_dir
+            l2_dir = self.l2_dir
 
         object.__setattr__(
             self, "l2_ds", xr.open_dataset(os.path.join(l2_dir, self.l2_filename))