python 简单连接mysql数据库

1. 安装pymysql 库

pip install pymysql

2.实例本地连接mysql库

#!/usr/bin/python
# encoding: utf-8

"""
@version: v1.0
@author: dabao
@license: Apache Licence
@contact: robbile@163.com
@site: http://www.cnblogs.com/EWWE/
@software: PyCharm Community Edition
@file: 1225.2.mysql.py
@time: 2017/12/25 22:07
"""

import pymysql

try:
    db = pymysql.connect("127.0.0.1", "root", "")
    cursor = db.cursor()#数据游标
    cursor.execute("show databases")#查询所有数据库
    cursor.execute("use world")#使用world数据库
    cursor.execute("show tables")#查询所有表
    cursor.execute("show columns from city")#查询表信息
    cursor.execute("select * from city where id<10")#查询city表中ID小于10的数据
    date = cursor.fetchall()#查询结果
    print date#打印查询结果
    db.close()
    print "登陆成功"
except:
    print "登陆失败"