Fix save path for v1 types df

Author: hschryver

src/xenium_analysis_tools/map_xenium/map_sections.py

@@ -53,15 +53,15 @@ def get_v1_merfish_cells(abc_cache=None, df_path=None):
         # Get MERFISH CCF metadata
         print('V1 cell df not found, generating new one...')
         if abc_cache is None:
-            raise ValueError("abc_cache must be provided if output_path does not exist")
+            raise ValueError("abc_cache must be provided if path to df does not exist")
         merfish_ccf_metadata = abc_cache.get_metadata_dataframe(
                     directory='MERFISH-C57BL6J-638850-CCF', 
                     file_name='cell_metadata_with_parcellation_annotation'
                 ).set_index('cell_label')
         v1_merfish_cells = merfish_ccf_metadata.loc[merfish_ccf_metadata['parcellation_structure']=='VISp']
         # Save created df
         print(f"Saving df to: {df_path}")
-        v1_merfish_cells.to_csv(output_path)
+        v1_merfish_cells.to_csv(df_path)
     return v1_merfish_cells
 
 def get_nodes_to_drop(cells_df, abc_cache, h_level='subclass', min_cells=0):