Added code comments.

Author: bramvds

src/pyscenic/export.py

@@ -191,7 +191,7 @@ def fetch_logo(context):
               col_attrs=column_attrs,
               file_attrs=general_attrs)
 
-
+#TODO: remove duplication with export2loom function!
 def add_scenic_metadata(adata: 'sc.AnnData',
                         auc_mtx: pd.DataFrame,
                         regulons: Union[None, Sequence[Regulon]] = None,