autocommit does not work in MySQLdb Python connector with MariaDB

If i run the following command in Python command line:

import MySQLdb

connArgs={"host": <server_url>,

                   "user": <user>,

                   "passwd": <password>,

                   "db": <database_name>}

conn = MySQLdb.connect(**connArgs)

conn.autocommit = True

cursor = conn.cursor(MySQLdb.cursors.DictCursor)

query = <insert_sql_query>

cursor.execute(query)

and then check the MariaDB database, the inserted tuple does not show up in a SELECT query output. If I commit as shown below, the new tuple shows up in SELECT query output.

conn.commit()

This works correctly in MySQL server 5.1.66, same MySQLdb module version.