added hostname to error message

inventory_provider/snmp.py

@@ -62,8 +62,8 @@ def walk(agent_hostname, community, base_oid):  # pragma: no cover
         # cf. http://snmplabs.com/
         #       pysnmp/examples/hlapi/asyncore/sync/contents.html
         assert not engineErrorIndication, (
-            'snmp response engine error indication: %r'
-            % str(engineErrorIndication))
+            f'snmp response engine error indication: '
+            f'{str(engineErrorIndication)} - {agent_hostname}')
         assert not pduErrorIndication, 'snmp response pdu error %r at %r' % (
             pduErrorIndication,
             errorIndex and varBinds[int(errorIndex) - 1][0] or '?')