This property is used to retrieve and set the SQL Modes for the current. The value should be list of different modes separated by comma (","), or a sequence of modes, preferably using the constants.SQLMode class.

To unset all modes, pass an empty string or an empty sequence.

>>> cnx.sql_mode = 'TRADITIONAL,NO_ENGINE_SUBSTITUTION'
>>> cnx.sql_mode.split(',')
[u'STRICT_TRANS_TABLES', u'STRICT_ALL_TABLES', u'NO_ZERO_IN_DATE',
u'NO_ZERO_DATE', u'ERROR_FOR_DIVISION_BY_ZERO', u'TRADITIONAL', 
u'NO_AUTO_CREATE_USER', u'NO_ENGINE_SUBSTITUTION']
>>> from mysql.connector.constants import SQLMode
>>> cnx.sql_mode = [ SQLMode.NO_ZERO_DATE, SQLMode.REAL_AS_FLOAT]
>>> cnx.sql_mode

u'REAL_AS_FLOAT,NO_ZERO_DATE'

Returns a string.