【Python + Mysql】之用pymysql库连接Mysql数据库并进行增删改查操作

用pip下载pymysql并引用

具体请参考文章:

Python之MySQL数据库增删改查操作

python3.6 使用 pymysql 连接 Mysql 数据库及 简单的增删改查操作*

Python3利用pymysql操作 MySQL

Python之pymysql的使用*

python(pymysql)之mysql简单操作

废话不多说,上代码:

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time    : 2018/09/21 09:20
# @Author  : zc
# @File    : PyMysql.py

import pymysql
from datetime import date,datetime,timedelta


def connectMysql():
    '''connectMysql
    连接Mysql数据库
    :return: db
    '''
    # 连接配置信息
    config = {
         'db' : "ET",               # 数据库
         'host' : "localhost",      # 主机
         'port' : 3306,             # 端口
         'user' : "root",           # 用户名
         'password' : "1234567"     # 密码
    }

    # 创建连接
    db = pymysql.connect(**config)
    # 返回数据库
    return db


def selectTable(sql):
    '''
    # 1.查询操作
    :return:查询表et01数据
    '''
    # 获取操作游标
    cur = connectMysql().cursor()
    try:
        cur.execute(sql)                # 执行sql语句
        results = cur.fetchall()        # 获取查询的所有记录
        print("id","name","age","date")
        # 遍历结果
        for row in results:
            et_id = row[0]
            et_name = row[1]
            et_age = row[2]
            et_date = row[3]
            # if 0 < et_id < 10:
            #     print("et_id:" + "0" + str(et_id),
            #           "et_name:" + et_name,
            #           "et_age:" + str(et_age),
            #           "et_date:" + str(et_date))
            # else:
            #     print("et_id:" + str(et_id),
            #           "et_name:" + et_name,
            #           "et_age:" + str(et_age),
            #           "et_date:" + str(et_date))
            print("et_id:" + str(et_id),
                      "et_name:" + et_name,
                      "et_age:" + str(et_age),
                      "et_date:" + str(et_date))
    except Exception as e:
        raise e
        print("raise后,会不会执行!")

    finally:
        connectMysql().close()          # 关闭连接


def publicMethods(sql,args):
    '''
    # 2.增、删、改操作
    :return:
    '''
    # 获取操作游标
    db = connectMysql()
    cur = db.cursor()

    try:
        cur.executemany(sql,args)
        # cur.execute(sql, ('zc02', 23, date(2018,9,22)))  # 另一种时间写法
        #插入多条数据
        # cur.executemany(sql, [("tom", "123"), ("alex", '321')])
        # 提交
        db.commit()
    except:
        # 错误回滚
        connectMysql().rollback()
    finally:
        cur.close()
        connectMysql().close()


if __name__ == '__main__':
    #1、查询数据库;2、插入数据;3、更新数据;4、删除数据;
    num = 1
    if num == 1:
        # 编写sql查询语句,对应我的表名:et01
        sql = "select * from et01;"
        selectTable(sql)
    elif num == 2:
        # 获取明天的时间
        tomorrow = datetime.now().date() + timedelta(days=1)
        # 插入语句
        insert_sql = "insert into et01(et_name,et_age,et_date) values(%s,%s,%s)"
        publicMethods(insert_sql,[('zc02',23,tomorrow)])
    elif num == 3:
        #更新语句
        update_sql = "update et01 set et_name = %s where et_id = %s;"
        publicMethods(update_sql,[('et01',1)])
    elif num == 4:
        #删除语句
        delete_sql = "delete from et01 where et_id = %s;"
        publicMethods(delete_sql,[(3)])

 

posted @ 2018-09-21 16:49  Owen_ET  阅读(580)  评论(0编辑  收藏  举报