Using private mibs with snmpv3 - pysnmp

Question

I am using below mentioned example to send v3 trap with custom notification mib
http://pysnmp.sourceforge.net/examples/current/v3arch/agent/ntforg/trap-v3.html
But the sendNotification function is accepting only the dotted format as in the example ..
What should I do to pass the symbols instead ?
E.g.(' MY-MIB:testTrap') instead of (1,3,2,0....)

Answer 1

You are linking a historical pysnmp documentation. Please, refer to the actual one.
To pass MIB symbols you should use ObjectIdentifier class which turns MIB names into OIDs behind the scenes.
But SNMP notifications can be quite complicated because they may imply certain other MIB objects to be automatically included with the notification being sent.
But you can still add whatever MIB objects you want through NotificationType.addVarBinds.
Here's a simple example:
from pysnmp.hlapi import *
errorIndication, errorStatus, errorIndex, varBinds = next(
sendNotification(
SnmpEngine(),
CommunityData('public'),
UdpTransportTarget(('demo.snmplabs.com', 162)),
ContextData(),
'trap',
NotificationType(
ObjectIdentity('MY-MIB', 'testTrap')
)
)
)

Answer 2

"Hi again below is a snippet of the way I am using the code . "
from pysnmp.entity import engine, config
from pysnmp.carrier.asynsock.dgram import udp
from pysnmp.entity.rfc3413 import ntforg, context
from pysnmp.proto.api import v2c
from pysnmp.proto import rfc1902
from pysnmp.smi import builder
file = open("."+"/file.txt","r")
line = file.read()
fields = line.split(",")
file.close()
file = open("."+"/credentials.txt","r")
cred = file.read()
fields = cred.split(",")
file.close()
snmpEngine = engine.SnmpEngine(snmpEngineID=v2c.OctetString(hexValue=cred[0]))
config.addV3User(snmpEngine, cred[1], config.usmHMACSHAAuthProtocol, cred[2], config.usmAesCfb128Protocol, cred[3])
config.addTargetParams(snmpEngine, 'my-creds', 'traptest', 'authPriv')
config.addSocketTransport(snmpEngine, udp.domainName, udp.UdpSocketTransport().openClientMode())
config.addTargetAddr(snmpEngine, 'my-nms', udp.domainName, ('127.0.0.1', 162), 'my-creds', tagList='all-my-managers')
config.addNotificationTarget(snmpEngine, 'my-notification', 'my-filter', 'all-my-managers', 'trap')
config.addContext(snmpEngine, '')
config.addVacmUser(snmpEngine, 3, 'traptest', 'authPriv', (), (), (1,3,6))
snmpContext = context.SnmpContext(snmpEngine)
ntfOrg = ntforg.NotificationOriginator()
ntfOrg.snmpContext = snmpContext
ntfOrg.sendNotification(
snmpEngine,
'my-notification',
(1,3,6,1,4,1,46033,1,1,2,2),
(((1,3,6,1,4,1,46033,1,1,1,1), v2c.OctetString(fields[0])),)
)
print('Notification is scheduled to be sent')