test.py

from ncclient import manager


media_channel = ''' 
<config xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">  
    <wavelength-router xmlns="http://openconfig.net/yang/wavelength-router">    
        <media-channels>      
            <channel operation="create">        
            <index>2</index>       
                <config>          
                <name>C_BAND</name>          
                <optical-band-parent xmlns="http://flex-scale-project.eu/yang/flex-scale-mg-on">1</optical-band-parent>          
                <index>2</index>          
                <lower-frequency>192006251</lower-frequency>          
                <upper-frequency>192056250</upper-frequency>       
                </config>        
            <dest>          
                <config>            
                <port-name>2</port-name>          
                </config>        
            </dest>      
            </channel>    
        </media-channels>  
    </wavelength-router>
</config>

'''






# Define device connection details
device = {
    'host': '10.0.2.4',  # replace with the target device's hostname or IP address
    'port': 2026,               # NETCONF default port
    'username': 'admin', # replace with your username
    'password': 'admin', # replace with your password
    'hostkey_verify': False ,   # disable host key verification (use only for testing)

    
    "look_for_keys": False,
    "allow_agent": False,

    "device_params": {
                "name": "default"
                },
}

# Establish a NETCONF connection
with manager.connect(**device) as m:
    print("Connected to the device successfully!")
    config = m.get_config(source='running').data_xml
  
    print("Device Configuration:")
    with open('d.log', 'w') as log_file:
        print(config,file=log_file)
    # result = m.edit_config(target='running', config=media_channel)
    # print (result)