pymysql简单链接示例

#!/usr/bin/env python
# encoding: utf-8  
# Date: 2018/6/24

import pymysql

username = input('username:')
password = input('password:')
conn = pymysql.connect(
    host='127.0.0.1',
    port=3306,
    user='root',
    password='123',
    db='stu_system',
    charset='utf8'
)

# 拿到游标
cursor = conn.cursor()

# 执行sql语句
if username.isdigit():
    username = int(username)
    sql = 'select * from stu_teacher where tid = %s and tname = "%s" ' % (username, password)

　rows = cursor.execute(sql)

# 防止sql注入方式

# sql = 'select * from stu_teacher where tid = %s and tname = %s '
    # rows = cursor.execute(sql, (username, password))

cursor.close()
conn.close()

if rows:
    print('success!!!')
else:
    print('xxxxxxxxxxx')