code: def addMibSource(self, *mibSources):
          
          if self._mibSourcesToAdd is None:
              self._mibSourcesToAdd = mibSources
  
          else:
              self._mibSourcesToAdd += mibSources
  
          return self
docs: Adds path to repository to search PySNMP MIB files.
  
          Parameters
          ----------
          *mibSources :
              one or more paths to search or Python package names to import
              and search for PySNMP MIB modules.
  
          Returns
          -------
          : :py:class:`~pysnmp.smi.rfc1902.ObjectIdentity`
              reference to itself
  
          Notes
          -----
          Normally, ASN.1-to-Python MIB modules conversion is performed
          automatically through PySNMP/PySMI interaction. ASN1 MIB modules
          could also be manually compiled into Python via the
          `mibdump.py <http://snmplabs.com/pysmi/mibdump.html>`_
          tool.
  
          Examples
          --------
          >>> ObjectIdentity('SNMPv2-MIB', 'sysDescr').addMibSource('/opt/pysnmp/mibs', 'pysnmp_mibs')
          ObjectIdentity('SNMPv2-MIB', 'sysDescr')
          >>>