pymysql的简单封装代码实例
这篇文章主要介绍了pymysql的简单封装代码实例,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下
#coding=utf-8
#!/usr/bin/python
import pymysql
class MYSQL:
"""
对pymysql的简单封装
"""
def __init__(self,host,user,pwd,db):
self.host = host
self.user = user
self.pwd = pwd
self.db = db
def __GetConnect(self):
"""
得到连接信息
返回: conn.cursor()
"""
if not self.db:
raise(NameError,"没有设置数据库信息")
self.conn = pymysql.connect(host=self.host,user=self.user,password=self.pwd,database=self.db,charset="utf8")
cur = self.conn.cursor()
if not cur:
raise(NameError,"连接数据库失败")
else:
return cur
def ExecQuery(self,sql):
"""
执行查询语句
返回的是一个包含tuple的list，list的元素是记录行，tuple的元素是每行记录的字段
调用示例：
ms = MYSQL(host="localhost",user="sa",pwd="123456",db="PythonWeiboStatistics")
resList = ms.ExecQuery("SELECT id,NickName FROM WeiBoUser")
for (id,NickName) in resList:
print str(id),NickName
"""
cur = self.__GetConnect()
cur.execute(sql)
resList = cur.fetchall()
#查询完毕后必须关闭连接
self.conn.close()
return resList
def ExecNonQuery(self,sql):
"""
执行非查询语句
调用示例：
cur = self.__GetConnect()
cur.execute(sql)
self.conn.commit()
self.conn.close()
"""
cur = self.__GetConnect()
cur.execute(sql)
self.conn.commit()
self.conn.close()
def main():
mysql = MYSQL(host="192.168.163.36",user="wisdomhr",pwd="wisdomhr",db="WISDOMHR")
resList = mysql.ExecQuery("SELECT CITY FROM RES_SCHOOL")
for inst in resList:
print(inst)
if __name__ == '__main__':
main()
用法如下:
#!/usr/bin/python
#version 3.4
import wispymysql
mysql = wispymysql.MYSQL(host="192.168.163.36",user="wisdomhr",pwd="wisdomhr",db="WISDOMHR")
selectsql = "SELECT ID, CITY FROM RES_SCHOOL WHERE CITY LIKE '%\r\n%'"
result = mysql.ExecQuery(selectsql)
for (dbid, city) in result:
rightcity = city.replace('\r\n','')
updatesql= "UPDATE RES_SCHOOL SET CITY = '" + rightcity + "' WHERE ID = " + str(dbid)
print(updatesql)
mysql.ExecNonQuery(updatesql)
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持【听图阁-专注于Python设计】。