python插入数据库

import pymysql
#打开数据库连接
db= pymysql.connect(host="w1.mengting.win",user="root",
     password="ABCabc123!",db="ZjiteQueryData",port=3306)

# 使用cursor()方法获取操作游标
cur = db.cursor()

sql_insert ="""insert into UserInfo(Uid,Pwd,Run,Szf) values(4,‘liu‘,‘1234‘)"""

try:
    cur.execute(sql_insert)
    #提交
    db.commit()
#print(‘abcc‘)
except Exception as e:
    #错误回滚
    db.rollback()
finally:
    db.close()