GET Operation

async pysnmp.hlapi.v3arch.asyncio.get_cmd(snmpEngine: SnmpEngine, authData: CommunityData | UsmUserData, transportTarget: AbstractTransportTarget, contextData: ContextData, *varBinds: ObjectType, **options) → tuple[ErrorIndication, Integer32 | int, Integer32 | int, tuple[ObjectType, ...]]

Creates a generator to perform SNMP GET query.

When iterator gets advanced by asyncio main loop, SNMP GET request is send (RFC 1905#section-4.2.1). The iterator yields asyncio.get_running_loop().create_future() which gets done whenever response arrives or error occurs.

Parameters:

  • snmpEngine (SnmpEngine) – Class instance representing SNMP engine.

  • authData (CommunityData or UsmUserData) – Class instance representing SNMP credentials.

  • transportTarget (UdpTransportTarget or Udp6TransportTarget) – Class instance representing transport type along with SNMP peer address.

  • contextData (ContextData) – Class instance representing SNMP ContextEngineId and ContextName values.

  • *varBinds (ObjectType) – One or more class instances representing MIB variables to place into SNMP request.

Other Parameters:

**options –

Request options:

  • lookupMib - load MIB and resolve response MIB variables at the cost of slightly reduced performance. Default is True.

Yields:

  • errorIndication (ErrorIndication) – True value indicates SNMP engine error.

  • errorStatus (str) – True value indicates SNMP PDU error.

  • errorIndex (int) – Non-zero value refers to varBinds[errorIndex-1]

  • varBinds (tuple) – A sequence of ObjectType class instances representing MIB variables returned in SNMP response.

Raises:

PySnmpError – Or its derivative indicating that an error occurred while performing SNMP operation.

Examples

>>> import asyncio
>>> from pysnmp.hlapi.v3arch.asyncio import *
>>>
>>> async def run():
...     errorIndication, errorStatus, errorIndex, varBinds = await get_cmd(
...         SnmpEngine(),
...         CommunityData('public'),
...         await UdpTransportTarget.create(('demo.pysnmp.com', 161)),
...         ContextData(),
...         ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0))
...     )
...     print(errorIndication, errorStatus, errorIndex, varBinds)
>>>
>>> asyncio.run(run())
(None, 0, 0, [ObjectType(ObjectIdentity(ObjectName('1.3.6.1.2.1.1.1.0')), DisplayString('SunOS zeus.pysnmp.com 4.1.3_U1 1 sun4m'))])
>>>