python paramiko模块远程执行多条命令

最近一直在用python的paramiko执行远程命令，发现如果直接写的话在每条命令后加分号执行时会报错，如果不加分号，分一条命令一条命令地执行，起不到作用，如切换路径等，后面在网上找到了相关的方法，只要在exec_command(cmd,get_pty=True)在命令语句后加get_pty=True即可。代码如下：

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def exec_command(self,cmd):     client = paramiko.SSHClient()     try:         client.set_missing_host_key_policy(paramiko.AutoAddPolicy())         client.connect(self.hostip, self.port, username=self.username, password=self.pwd, timeout=20)         stdin, stdout, stderr = client.exec_command(cmd,get_pty=True)         # logWriteToTxt(self.sitename + "执行"+cmd)         res=""         results = stdout.readlines()           for line in results:             res+=line         try:             err=stderr.readlines()             for line in err:                 res+=line         except:             pass             # results = stdout.readlines()         # logWriteToTxt("在" + self.sitename + "执行"+cmd + res)           return res     except:         pass     finally:         client.close()