#（填注释）

        self.server = server

        self.username = username

        self.password = password

self.client = self._get_client()

        self.cli = self.client.invoke_shell()

        self.cli.send('screen-length 0 temporary\n')

        sleep(5)

        self.cli.recv(99999)

    def _get_client(self):

        client = SSHClient()

        client.load_system_host_keys()

        client.set_missing_host_key_policy(AutoAddPolicy)

        client.connect(self.server, username=self.username, password=self.password)

        return client

    def command(self, cmd):

        self.cli.send('{}\n'.format(cmd))

        sleep(10)

        return self.cli.recv(99999).decode()

    def check_fan_fault(self):

        fan_info = self.command('display fan')

        return fan_info.find('Normal') == -1

    def download_config(self, target, config_path='/vrpcfg.zip'):

        print('Download Starting...')

        client = self._get_client()

        sftp = client.open_sftp()

        sftp.get(config_path, target)

        client.close()

        print('Download Finish.....')

    def close(self):

        self.client.close()

def netconf_by_rpc(device_ip, username, password, rpc_content):

    with manager.connect_ssh(

            host=device_ip,

            username=username,

            password=password,

            hostkey_verify=False,

            device_params={'name': 'huaweiyang'}

def netconfig_config_syslog_host(device_ip, username, password, log_server):

    rpc_content = '''

      <edit-config>

        <target>

          <running/>

        </target>

        <config>

          <syslog:syslog xmlns:syslog="urn:ietf:params:xml:ns:yang:ietf-syslog">

            <syslog:log-actions>

              <syslog:remote>

                <syslog:destination>

                  <syslog:name>syslog_host</syslog:name>

                  <syslog:udp>

                    <syslog:address>{}</syslog:address>

                    <syslog:port>43</syslog:port>

                  </syslog:udp>

                  <syslog:destination-facility xmlns:ietf-syslog-types="urn:ietf:params:xml:ns:yang:ietf-syslog-types">ietf-syslog-types:local0</syslog:destination-facility>

                </syslog:destination>

              </syslog:remote>

            </syslog:log-actions>

          </syslog:syslog>

        </config>

      </edit-config>

    '''.format(log_server)

    print('Using NETCONF for configuration syslog host node...')

    netconf_by_rpc(device_ip, username, password, rpc_content)

def datacom_loop(device_ip, username, password, device_name):

    try:

        while True:

            datacom = Datacom(device_ip, username, password)

            with open('command.txt') as f:

                for command in f:

                    print(datacom.command(command))

            if datacom.check_fan_fault():

                print('All fans are faulty.')

            try:

                one_day_delta = datetime.now() - last_downloadtime >= timedelta(days=1)

            except NameError:

                one_day_delta = True

            if one_day_delta:

                downloadtime = datetime.now()

                download_date = downloadtime.strftime('%Y_%m_%d')

                config_filename = '{}_{}.zip'.format(download_date, device_name)

                backup_filename = '{}_{}.bak'.format(download_date, device_name)

                datacom.command('save force {}'.format(config_filename))

                datacom.download_config(backup_filename, config_filename)

                last_downloadtime = downloadtime

            datacom.close()

            sleep(5 * 60)

device_ip = '10.1.0.6'

device_name = 'X_T1_AGG1'

log_server = '10.1.60.2'

username = 'python'

password = 'Huawei@123'

nc_username = 'netconf'

nc_password = 'Huawei@123'

    except KeyboardInterrupt:

        print('Monitoring is Stopped！')