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python数据库操作

时间:2017-02-20 18:52:34      阅读:285      评论:0      收藏:0      [点我收藏+]

标签:har   sts   cal   class   str   sel   插入数据   for   exists   

如果是jar来做,那么第一件事就是要jar包喽,用pip安装pymysql(注:我用的是python 3.5)

import os, sys, string
import pymysql
 
# 连接数据库 
try:
    #conn = pymysql.connect(host=‘localhost‘,user=‘root‘,passwd=‘root‘,db=‘test‘,charset=‘utf8‘)
    conn = pymysql.connect(host=127.0.0.1,port=3306,user=root,passwd=root,db=test,charset=utf8)
except Exception as e:
    print(e)
    sys.exit()
 
# 获取cursor对象来进行操作
 
cursor = conn.cursor()
# 创建表
sql = "create table if not exists test1(name varchar(128) primary key, age int(4))"
cursor.execute(sql)
# 插入数据
sql = "insert into test1(name, age) values (‘%s‘, %d)" % ("zhaowei", 23)
try:
    cursor.execute(sql)
except Exception as e:
    print(e)
 
sql = "insert into test1(name, age) values (‘%s‘, %d)" % ("张三", 21)
try:
    cursor.execute(sql)
except Exception as e:
    print(e)
# 插入多条
 
sql = "insert into test1(name, age) values (%s, %s)"
val = (("李四", 24), ("王五", 25), ("洪六", 26))
try:
    cursor.executemany(sql, val)
except Exception as e:
    print(e)
 
#查询出数据
sql = "select * from test1"
cursor.execute(sql)
alldata = cursor.fetchall()
# 如果有数据返回,就循环输出, alldata是有个二维的列表
if alldata:
    for rec in alldata:
        print(rec[0], rec[1])
 
conn.commit() 
cursor.close()
 
conn.close()

据说python 3之后异常捕获要这样写except Exception as e:,之前是except Exception, e:

 

python数据库操作

标签:har   sts   cal   class   str   sel   插入数据   for   exists   

原文地址:http://www.cnblogs.com/wujf/p/6420729.html

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