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()
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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。