Navigating Data

In the previous tutorial we saw how to parse configuration. In this tutorial we are going to see how we can navigate the data we extracted.

Let’s start by parsing the configuration as in the previous example:

from ntc_rosetta import get_driver

ios = get_driver("ios", "openconfig")
ios_driver = ios()

with open("data/ios/config.txt", "r") as f:
    config = f.read()

parsed = ios_driver.parse(native={"dev_conf": config})

Raw value

The most basic form of navigating the data is by using the method raw_value, which returns the object using only builtin datastructures:

raw = parsed.raw_value()
raw

{'openconfig-interfaces:interfaces': {'interface': [{'name': 'FastEthernet1',
    'config': {'name': 'FastEthernet1',
     'type': 'iana-if-type:ethernetCsmacd',
     'description': 'This is Fa1',
     'enabled': False},
    'subinterfaces': {'subinterface': [{'index': 1,
       'config': {'index': 1, 'description': 'This is Fa1.1'}},
      {'index': 2, 'config': {'index': 2, 'description': 'This is Fa1.2'}}]}},
   {'name': 'FastEthernet3',
    'config': {'name': 'FastEthernet3',
     'type': 'iana-if-type:ethernetCsmacd',
     'description': 'This is Fa3',
     'enabled': True},
    'openconfig-if-ethernet:ethernet': {'openconfig-vlan:switched-vlan': {'config': {'interface-mode': 'ACCESS',
       'access-vlan': 10}}}},
   {'name': 'FastEthernet4',
    'config': {'name': 'FastEthernet4',
     'type': 'iana-if-type:ethernetCsmacd',
     'enabled': False},
    'openconfig-if-ethernet:ethernet': {'openconfig-vlan:switched-vlan': {'config': {'interface-mode': 'TRUNK',
       'trunk-vlans': [10, 20]}}}}]},
 'openconfig-network-instance:network-instances': {'network-instance': [{'name': 'default',
    'config': {'name': 'default'},
    'vlans': {'vlan': [{'vlan-id': 10,
       'config': {'vlan-id': 10, 'name': 'prod', 'status': 'ACTIVE'}},
      {'vlan-id': 20,
       'config': {'vlan-id': 20, 'name': 'dev', 'status': 'SUSPENDED'}}]}}]}}

print(raw["openconfig-interfaces:interfaces"]["interface"][0]["config"]["description"])

This is Fa1

Instance identifiers

You can also use instance identifiers to get data from the object, to do so use the method peek:

parsed.peek("/openconfig-interfaces:interfaces/interface=FastEthernet1/config/description")

'This is Fa1'

parsed.peek("/openconfig-interfaces:interfaces/interface=FastEthernet1/subinterfaces/subinterface=1/config/description")

'This is Fa1.1'

parsed.peek("/openconfig-interfaces:interfaces/interface=FastEthernet3/openconfig-if-ethernet:ethernet/openconfig-vlan:switched-vlan")

{'config': {'interface-mode': 'ACCESS', 'access-vlan': 10}}