diff --git a/src/mods4pandas/lib.py b/src/mods4pandas/lib.py
index 00192a0..0cf0407 100644
--- a/src/mods4pandas/lib.py
+++ b/src/mods4pandas/lib.py
@@ -356,7 +356,7 @@ def insert_into_db(con, table, d: Dict):
 
     # Add columns if necessary
     for k in d.keys():
-        if not k in current_columns[table]:
+        if k not in current_columns[table]:
             assert valid_column_key(k), f'"{k}" is not a valid column name'
             current_columns[table].append(k)
             con.execute(f'ALTER TABLE {table} ADD COLUMN "{k}"')
diff --git a/src/mods4pandas/mods4pandas.py b/src/mods4pandas/mods4pandas.py
index 78a967b..d1a3d4f 100755
--- a/src/mods4pandas/mods4pandas.py
+++ b/src/mods4pandas/mods4pandas.py
@@ -601,7 +601,7 @@ def process(mets_files: list[str], output_file: str, output_page_info: str):
                         # noinspection PyTypeChecker
                         for caught_warning in caught_warnings:
                             csvwriter.writerow([mets_file, caught_warning.message])
-            except Exception as e:
+            except Exception:
                 logger.exception("Exception in {}".format(mets_file))
 
     logger.info("Writing DataFrame to {}".format(output_file))