from ncclient import manager
from ncclient.xml_ import *
import lxml.etree as ET

device = {
    'host': '10.0.2.10',        # IP address or hostname of the remote machine
    'port': 2023,                # SSH port (default: 22)
    'username': 'admin',    # SSH username
    'password': 'admin',    # SSH password
    'device_params': {'name': 'default'},
     'hostkey_verify':False,
     "allow_agent":False
     ,"look_for_keys":False
}
def extract_value (xml_data):
    xml_bytes = xml_data.encode("utf-8")
    root = ET.fromstring(xml_bytes)
    namespace = {'oc': 'http://openconfig.net/yang/platform',
              'td': 'http://openconfig.net/yang/terminal-device'}

    element = root.find('.//oc:component[oc:name="channel-4"]', namespace)
    if element is not None:
      parameter= element.find('.//td:frequency',namespace)
      if (parameter is not None):
         print(parameter.text)
      else :
          print("parameter is None")   
      
    else:
       print(" element not found.")

with manager.connect(**device) as m:
    # Perform operations on the remote machine using the 'm' object
    # For example, you can retrieve the running configuration:
    #result =m.edit_config(target='running',config=edit_config)
    running_config = m.get_config('running').data_xml
   
   
   
    extract_value(running_config)