from pysnmp.entity.rfc3413.oneliner import cmdgen
from pysnmp.proto import rfc1902

cmdGen = cmdgen.CommandGenerator()

errorIndication, errorStatus, errorindex, varBinds = cmdGen.setCmd(
    cmdgen.CommunityData('public'),
	cmdgen.UdpTransportTarget(('192.168.1.3',161)),
	('1.3.6.1.2.1.1.5.0',rfc1902.OctetString('R333'))
)

if errorIndication:
	print(errorIndication)
elif errorStatus:
	print('%s at %s' % (
			errorStatus.prettyPrint(),
			errorindex and varBinds[int(errorindex)-1][0] or '?'
		)
	)
for name,val in varBinds:
	print('%s = %s' % (name.prettyPrint(),val.prettyPrint()))