code: def loadModule(self, modName, **userCtx):
          
          for mibSource in self._mibSources:
              debug.logger & debug.FLAG_BLD and debug.logger(
                  'loadModule: trying %s at %s' % (modName, mibSource))
  
              try:
                  codeObj, sfx = mibSource.read(modName)
  
              except IOError as exc:
                  debug.logger & debug.FLAG_BLD and debug.logger(
                      'loadModule: read %s from %s failed: '
                      '%s' % (modName, mibSource, exc))
                  continue
  
              modPath = mibSource.fullPath(modName, sfx)
  
              if modPath in self._modPathsSeen:
                  debug.logger & debug.FLAG_BLD and debug.logger(
                      'loadModule: seen %s' % modPath)
                  break
  
              else:
                  self._modPathsSeen.add(modPath)
  
              debug.logger & debug.FLAG_BLD and debug.logger(
                  'loadModule: evaluating %s' % modPath)
  
              g = {'mibBuilder': self,
                   'userCtx': userCtx}
  
              try:
                  exec(codeObj, g)
  
              except Exception:
                  self._modPathsSeen.remove(modPath)
                  raise error.MibLoadError(
                      'MIB module "%s" load error: '
                      '%s' % (modPath, traceback.format_exception(*sys.exc_info())))
  
              self._modSeen[modName] = modPath
  
              debug.logger & debug.FLAG_BLD and debug.logger(
                  'loadModule: loaded %s' % modPath)
  
              break
  
          if modName not in self._modSeen:
              raise error.MibNotFoundError(
                  'MIB file "%s" not found in search path '
                  '(%s)' % (modName and modName + ".py[co]", ', '.join(
                      [str(x) for x in self._mibSources])))
  
          return self
docs: Load and execute MIB modules as Python code