skip printing out non-initialized MIB objects in example MIB walk

1 files changed, 3 insertions, 3 deletions

diff --git a/examples/smi/agent/operations-on-managed-objects.py b/examples/smi/agent/operations-on-managed-objects.py
index b2373829..7d1f300c 100644
--- a/examples/smi/agent/operations-on-managed-objects.py
+++ b/examples/smi/agent/operations-on-managed-objects.py
@@ -33,16 +33,16 @@ varBinds = mibInstrum.writeVars(
      (snmpCommunityEntry.name + (7,) + instanceId, 'volatile'))
 )
 for oid, val in varBinds:
-    print('%s = %s' % ('.'.join([str(x) for x in oid]), val.prettyPrint()))
+    print('%s = %s' % ('.'.join([str(x) for x in oid]), not val.isValue and 'N/A' or val.prettyPrint()))
 print('done')
 
 print('Read whole MIB (table walk)')
 oid, val = (), None
-while 1:
+while True:
     oid, val = mibInstrum.readNextVars(((oid, val),))[0]
     if exval.endOfMib.isSameTypeWith(val):
         break
-    print('%s = %s' % ('.'.join([str(x) for x in oid]), val.prettyPrint()))
+    print('%s = %s' % ('.'.join([str(x) for x in oid]), not val.isValue and 'N/A' or val.prettyPrint()))
 print('done')
 
 print('Unloading MIB modules...'),