Retrieving printer toner information with pysnmp

Question

I am trying to retrieve printer toner information from networked printers.

I found the following reference record for printer supplies -> http://oidref.com/1.3.6.1.2.1.43.11 (OID = prtMarkerSupplies)

I tried integrating the OID in the following code:

from pysnmp.hlapi import *

iterator = getCmd(
    SnmpEngine(),
    CommunityData('public', mpModel=0),
    UdpTransportTarget(('here goes ip of a printer', 161)),
    ContextData(),

    ObjectType(ObjectIdentity('SNMPv2-MIB', "prtMarkerSupplies", 0))
)

errorIndication, errorStatus, errorIndex, varBinds = next(iterator)


if errorIndication:
    print(errorIndication)

elif 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]))

The above code returns:

pysnmp.smi.error.SmiError: No symbol SNMPv2-MIB::prtMarkerSupplies at <pysnmp.smi.builder.MibBuilder object at 0x000001F8D1FC3D00>

How can I retrieve toner information using the SNMP protocol and pysnmp?

Retrieving system information works as intended:

ObjectType(ObjectIdentity('SNMPv2-MIB', "sysDescr", 0))

Answer 1

I used the answer from the following thread -> snmpwalk with PySNMP

Instead of iterating over getCmd, I used SNMP walk to walk through all of the OIDs.