How to connect python to mysql database

1. Import module

#导入模块
import pymysql

2. Open database connection

#打开数据库连接
#注意：这里已经假定存在数据库testdb，db指定了连接的数据库，当然这个参数也可以没有
db = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='1234', db='testdb', charset='utf8')

3. Create cursor object cursor

#使用cursor方法创建一个游标
cursor = db.cursor()

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