Python基础学习九 数据库备份

 class BakDb(object):
     def __init__(self,ip,username,passwd,port=3306,path=r'C:\Users\BJQT\Desktop\data_back'):
         self.ip = ip
         self.username = username
         self.passwd = passwd
         self.port = port
         self.path = path
         self.path_exist()
         self.bak_db()

     def path_exist(self):
         if not os.path.isdir(self.path): #判断路径是否存在，不存在就创建
             os.mkdir(self.path)

     def bak_db(self):
         # mysqldump - u%s - p%s -P%s -h%s - A > XXX.sql
         filename = str(datetime.date.today())+'.sql'
         abs_file = os.path.join(self.path,filename) #变成绝对路径
         # 路径不要有空格，否则SQL文件为空  C:\mysqldump.exe
         command =r'''
         C:\mysqldump.exe -u{username} -p{passwd} -P{port} -h{ip} -A > {filename}

         '''.format(username = self.username,
                     passwd = self.passwd,
                     port= self.port,
                     filename = abs_file,
                     ip = self.ip)
         os.system(command)
         print('done!数据库备份完成！')

 db1 = BakDb('172.19.23.191','root','')
 db1.bak_db()