executemany does not work with returning clause

>>> import mariadb

>>> db = mariadb.connect(host='192.168.1.1', user='Administrador', password='xxxxxxx', database='yyyyyyy')

>>> qr = db.cursor(buffered=True)

>>> 

>>> qr.execute('create table temp_test (a int unsigned not null primary key auto_increment, b int)')

>>> rows = [(1, ), (2, ), (3, )]

>>> qr.executemany('insert into temp_test (b) values (?) returning a', rows)

>>> qr.fetchall()

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

mariadb.ProgrammingError: Cursor doesn't have a result set

>>> 

>>> qr.execute('insert into temp_test (b) values (1), (2), (3) returning a')

>>> qr.fetchall()

[(4,), (5,), (6,)]

>>>