excluded pxc ports and related lags. RE DBOARD3-997

inventory_provider/nokia.py

 import ipaddress
 import logging
 import re
+from functools import lru_cache
 
 from lxml import etree
 from ncclient import manager, xml_
@@ -173,6 +174,19 @@ def get_interfaces_state(state_doc):
         yield details
 
 
+@lru_cache
+def get_pxc_ports(netconf_config):
+    # these ports will be ignored for the purposes of the update
+    pxc_ports = set()
+    for port in netconf_config.findall('./configure/port-xc/pxc'):
+        pxc_ports.add(port.find('port-id').text)
+    for port in netconf_config.findall('./configure/port'):
+        port_id = port.find('port-id').text
+        if port_id.startswith('pxc'):
+            pxc_ports.add(port_id)
+    return pxc_ports
+
+
 def get_ports_config(netconf_config):
     def _port_info(e):
         pi = {
@@ -193,10 +207,14 @@ def get_ports_config(netconf_config):
                 breakout_match.group('unit'), 'Unknown')
         return pi
 
+    pxc_ports = get_pxc_ports(netconf_config)
     # making the assumption that the breakout ports are listed directly before their
     current_parent_port = None
     # child ports
     for port in netconf_config.findall('./configure/port'):
+        port_id = port.find('port-id').text
+        if port_id in pxc_ports:
+            continue
         port_info = _port_info(port)
         if 'breakout' in port_info:
             current_parent_port = port_info
@@ -212,6 +230,7 @@ def get_lags_config(netconf_config):
     enabled_ports = {
         p['port-id'] for p in get_ports_config(netconf_config) if p['admin-state'] == 'enable'
     }
+    pxc_ports = get_pxc_ports(netconf_config)
 
     def _lag_info(e):
         _name = e.find('./lag-name').text
@@ -228,6 +247,9 @@ def get_lags_config(netconf_config):
         return ifc
 
     for lag in netconf_config.findall('./configure/lag'):
+        ports = {p.find('./port-id').text for p in lag.findall('./port')}
+        if pxc_ports > ports:
+            continue
         yield _lag_info(lag)