psycopg2.cur has no method commit()

model.py

@@ -29,7 +29,6 @@ def database_select(cur, query):
 def database_insert(cur, query):
     try:
         cur.execute(query)
-        cur.commit()
     except (Exception, psycopg2.Error) as error:
         print("PostgreSQL error from psycopg2:", error)