>>> from pysnmp.hlapi import *
>>>
>>> SnmpEngine()
SnmpEngine(snmpEngineID=OctetString(hexValue='80004fb80567'))
iterator = getCmd(SnmpEngine(),
                  CommunityData('public'),
                  UdpTransportTarget(('192.168.149.29', 161)),
                  ContextData(),
                  ObjectType(ObjectIdentity("1.3.6.1.2.1.1.3")))
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