python3 链接Mysql数据库

使用的是PyMySql组件

pip3 install PyMySQL

代码

#!/usr/bin/python3
import pymysql
 
# 打开数据库连接
conn = pymysql.connect (
    host=‘127.0.0.1‘,
    port=3306,
    user=‘root‘,
    password=‘12345‘,
    database=‘mysql‘,
    charset=‘utf8‘
)

cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)  # 返回字典数据类型
 
# 定义将要执行的sql语句
# sql = ‘select user from user;‘
sql = "SELECT user FROM user"
# 拼接并执行sql语句
cursor.execute(sql)
 
try:
    cursor.execute(sql)
   # 获取所有记录列表
    results = cursor.fetchall()
    
    for x in results:
        print(x)
except:
    print ("Error: unable to fetch data")

cursor.close()
conn.close()