软硬件环境
OS X EI Capitan
Python 3.5.1
mysql 5.6
前言
在开发中经常涉及到数据库的使用,而python对于数据库也有多种解决方法。本文以python3中的mysql为例,介绍pymysql模块的使用。
准备数据库
创建一个mysql数据库,名字叫testdb,建立一张表叫testtable,它有3个字段,分别是id,数据类型是INT(11),设为主键、非空、UNSIGNED、AUTO INCREMENT,name,数据类型是VARCHAR(45),设为非空、唯一,sex,数据类型是VARCHAR(45),设为非空
python3 源码
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# -*- coding: utf-8 -*- __author__ = 'djstava@gmail.com' import logging import pymysql class MySQLCommand( object ): def __init__( self ,host,port,user,passwd,db,table): self .host = host self .port = port self .user = user self .password = passwd self .db = db self .table = table def connectMysql( self ): try : self .conn = pymysql.connect(host = self .host,port = self .port,user = self .user,passwd = self .password,db = self .db,charset = 'utf8' ) self .cursor = self .conn.cursor() except : print ( 'connect mysql error.' ) def queryMysql( self ): sql = "SELECT * FROM " + self .table try : self .cursor.execute(sql) row = self .cursor.fetchone() print (row) except : print (sql + ' execute failed.' ) def insertMysql( self , id ,name,sex): sql = "INSERT INTO " + self .table + " VALUES(" + id + "," + "'" + name + "'," + "'" + sex + "')" try : self .cursor.execute(sql) except : print ( "insert failed." ) def updateMysqlSN( self ,name,sex): sql = "UPDATE " + self .table + " SET sex='" + sex + "'" + " WHERE name='" + name + "'" print ( "update sn:" + sql) try : self .cursor.execute(sql) self .conn.commit() except : self .conn.rollback() def closeMysql( self ): self .cursor.close() self .conn.close() |
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服务器之家。