ReferenceError: weakly-referenced object no longer exists

[buran]

if you look at the mysql.connector source code you will see it uses weakref

class CMySQLCursor(MySQLCursorAbstract):

    """Default cursor for interacting with MySQL using C Extension"""

    _raw = False
    _buffered = False
    _raw_as_string = False

    def __init__(self, connection):
        """Initialize"""
        MySQLCursorAbstract.__init__(self)

        self._insert_id = 0
        self._warning_count = 0
        self._warnings = None
        self._affected_rows = -1
        self._rowcount = -1
        self._nextrow = (None, None)
        self._executed = None
        self._executed_list = []
        self._stored_results = []

        if not isinstance(connection, MySQLConnectionAbstract):
            raise errors.InterfaceError(errno=2048)
        self._cnx = weakref.proxy(connection)

So, actually the weakly referenced object is connection and it is destroyed, which leads to error in execute(), line 232

        if not self._cnx: