# SNMP variables MIB resolution
from pysnmp.smi import builder, view, rfc1902, error

# MIB Builder manages pysnmp MIBs
mibBuilder = builder.MibBuilder()

# MIB View Controller implements various queries to loaded MIBs
mibView = view.MibViewController(mibBuilder)

# Obtain MIB object information by MIB object name
mibVar = rfc1902.ObjectIdentity('IF-MIB', 'ifInOctets', 1)

# Optionally attach PySMI MIB compiler to MIB Builder that would
# create pysnmp MIBs on demand from ASN.1 sources downloaded from
# a web site.
try:
    mibVar.addMibCompiler('http://mibs.snmplabs.com/asn1/<mib>')
except error.SmiError:
    print('WARNING: not using MIB compiler (PySMI not installed)')

mibVar.resolveWithMib(mibView)

print(mibVar.prettyPrint(), tuple(mibVar), str(mibVar))

# Obtain MIB object information by its [sequence] OID
mibVar = rfc1902.ObjectIdentity(tuple(mibVar)).resolveWithMib(mibView)

print(mibVar.prettyPrint(), tuple(mibVar), str(mibVar))

# Obtain MIB object information by its [string] OID
mibVar = rfc1902.ObjectIdentity(str(mibVar)).resolveWithMib(mibView)

print(mibVar.prettyPrint(), tuple(mibVar), str(mibVar))

# Create an OID-value pair (called variable-binding in SNMP)
varBind = rfc1902.ObjectType(
    rfc1902.ObjectIdentity('SNMPv2-MIB', 'sysObjectID', 0), '1.3.6.1'
).resolveWithMib(mibView)

print(varBind[0].prettyPrint(), varBind[1].__class__.__name__, varBind[1].prettyPrint())

# Create just OID
varBind = rfc1902.ObjectType(
    rfc1902.ObjectIdentity('SNMPv2-MIB', 'sysObjectID', 0)
).resolveWithMib(mibView)

print(varBind[0].prettyPrint(), varBind[1].__class__.__name__, varBind[1].prettyPrint())

# Create var-binds from MIB notification object (without OBJECTS clause)
varBinds =  rfc1902.NotificationType(
    rfc1902.ObjectIdentity('SNMPv2-MIB', 'coldStart')
).resolveWithMib(mibView)

print([ '%s = %s(%s)' % (x[0].prettyPrint(), x[1].__class__.__name__, x[1].prettyPrint()) for x in varBinds])

# Create var-binds from MIB notification object (with OBJECTS clause)
varBinds =  rfc1902.NotificationType(
    rfc1902.ObjectIdentity('IF-MIB', 'linkUp'),
    instanceIndex = (1,),
    objects= { ('IF-MIB', 'ifOperStatus'): 'down' }
).resolveWithMib(mibView)

print(varBinds.prettyPrint())