pymysql-增删改查

1. pymysql-增删改查

#!/usr/bin/env python3
# _*_ coding: utf-8 _*_
# Author:shichao
# File: .py

import pymysql
conn = pymysql.connect(host='127.0.0.1',
                       port=3306,
                       user='test',
                       password='Test@963852',
                       db='test',
                       charset='utf8',
                       cursorclass=pymysql.cursors.DictCursor)
try:
    with conn.cursor() as cursor:
        sql = "select id,username,password from user"
        cursor.execute(sql)
        result = cursor.fetchall()    # 获取所有数据
        for dict in result:
            print(f"ID: {dict['id']}, 用户名: {dict['username']}, 密码: {dict['password']}")

    # 修改数据
    with conn.cursor() as cursor:                                 # 游标
        sql = "update user set username='test2' where  id= 3"
        cursor.execute(sql)
        conn.commit()
finally:
    conn.close()     # mysql关闭