#
# Command Generator
#
# Send SNMP GET request using the following options:
#
# * with SNMPv3 with user 'usr-md5-des', MD5 auth and DES privacy protocols
# * use remote SNMP Engine ID 0x80004fb805636c6f75644dab22cc (USM
#   autodiscovery will run)
# * over IPv4/UDP
# * to an Agent at demo.snmplabs.com:161
# * setting SNMPv2-MIB::sysName.0 to new value (type taken from MIB)
#
from pysnmp.entity.rfc3413.oneliner.cmdgen import *
from pysnmp.proto import rfc1902

for errorIndication, \
    errorStatus, errorIndex, \
    varBinds in setCmd(SnmpEngine(),
                       UsmUserData(
                           'usr-md5-des', 'authkey1', 'privkey1',
                           securityEngineId=rfc1902.OctetString(
                               hexValue='80004fb805636c6f75644dab22cc'
                           )
                       ),
                       UdpTransportTarget(('demo.snmplabs.com', 161)),
                       ContextData(),
                       ObjectType(
                           ObjectIdentity('SNMPv2-MIB', 'sysORDescr', 1),
                           'new system name'
                       )):
    # Check for errors and print out results
    if errorIndication:
        print(errorIndication)
    else:
        if errorStatus:
            print('%s at %s' % (
                    errorStatus.prettyPrint(),
                    errorIndex and varBinds[int(errorIndex)-1][0] or '?'
                )
            )
        else:
            for varBind in varBinds:
                print(' = '.join([ x.prettyPrint() for x in varBind ]))
    break