python数据库操作

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: