[Python]paramiko实时获取命令执行输出及sftp上传

import paramiko, osclass preExecute():    def __init__(self, _hostip, _username, _password):        self.__channel = group        self.__hostip = _hostip        self.__username = _username        self.__password = _password        self.__sshclient = self.ssh_connect(self.__hostip, self.__username, self.__password)        self.__currentpath = os.getcwd()        self.__destdir = "/opt/uniagentdfr/"        self.__sftpclient = None    def __del__(self):        self.__sshclient.close()        try:            self.__sftpclient.close()        except:            pass    def run(self):        self.execute('mkdir -p '+self.__destdir)        filename = self.__currentpath+"/controller/static/controller/module.zip"        self.sftp_put(filename, self.__destdir + "module.zip")                self.execute("cd "+self.__destdir+ ";")        self.execute("touch /opt/uniagentdfr/aaaaa;")        self.execute("unzip -o /opt/uniagentdfr/module.zip  -d /opt/uniagentdfr/;")        self.execute("chmod -R 755 *;")               self.__del__();    def ssh_connect(self,_host, _username, _password):        try:            _ssh_fd = paramiko.SSHClient()            _ssh_fd.set_missing_host_key_policy(paramiko.AutoAddPolicy())            _ssh_fd.connect(_host, username=_username, password=_password)            return _ssh_fd        except Exception as e:            print('ssh %s@%s:passwd %s, error message is %s' % (_username, _host,_password, e))    def sftp_open(self):        if self.__sftpclient is None:            self.__sftpclient = self.__sshclient.open_sftp()        return ;    def sftp_put(self, _put_from_path, _put_to_path):        self.sftp_open()        return self.__sftpclient.put(_put_from_path, _put_to_path)    def sftp_get(self,_get_from_path, _get_to_path):        self.__sftpclient = self.sftp_open(self.__sshclient)        self.__sftpclient.get(_get_from_path, _get_to_path)        self.__sftpclient.close()        self.__sftpclient = None        return ;    def execute(self, command):        try:            stdin, stdout, stderr = self.__sshclient.exec_command(command)            for line in stdout:                print(line.strip("\n"))        except Exception as e:            print("execute command %s error, error message is %s" % (command, e))            return ""