How to pass MIB to the Manager
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17. How to make use of random MIBs at my Manager application?

1. Starting from PySNMP 4.3.x, plain-text (ASN.1) MIBs can be
   automatically parsed into PySNMP form by the PySMI tool.  PySNMP
   will call PySMI automatically, parsed PySNMP MIB will be cached in
   $HOME/.pysnmp/mibs/ (default location).

   MIB compiler could be configured to search for plain-text MIBs at
   multiple local and remote locations. As for remote MIB repos, you
   are welcome to use our collection of ASN.1 MIB files at
   http://mibs.snmplabs.com/asn1/ as shown below.

   from pysnmp.hlapi import *

   errorIndication, errorStatus, errorIndex, varBinds = next(
       getCmd(SnmpEngine(),
              CommunityData('public'),
              UdpTransportTarget(('demo.snmplabs.com', 161)),
              ContextData(),
              ObjectType(ObjectIdentity('IF-MIB', 'ifInOctets', 1).addAsn1MibSource('file:///usr/share/snmp',
                                                                                    'http://mibs.snmplabs.com/asn1/@mib@')))
   )

   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]))

"Download" script.

Alternatively, you can invoke the mibdump.py (shipped with PySMI) by
hand and this way compile plain-text MIB into PySNMP format. Once the
compiled MIBs are stored in a directory, add the directory to your
MibBuilder's MibSources.

   builder = engine.getMibBuilder()
   # Make ./mibs available to all OIDs that are created
   # e.g. with "MIB-NAME-MIB::identifier"
   builder.addMibSources(builder_module.DirMibSource(
       os.path.join( HERE, 'mibs')
   ))
