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：

    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()