解决ReferenceError: weakly-referenced object no longer exists

import mysql.connector

db_info = dict()
db_info['host'] = ‘127.0.0.1’
db_info['port'] = 3306
db_info['user'] = ‘root’
db_info['passwd'] = 'root'
db_info['database'] = 'test'
cur = mysql.connector.connect(**db_info).cursor()
cur.execute("SHOW databases;")

File "/usr/lib64/python2.7/site-packages/mysql/connector/cursor_cext.py", line 232, in execute
    if not self._cnx:
ReferenceError: weakly-referenced object no longer exists

代码报错的原因是这行：cur = mysql.connector.connect(**db_info).cursor()
解决方法是：拆成两行才可以

conn = mysql.connector.connect(**db_info)
cur = conn.cursor()