old_contents: try:
      from sys import version_info
  except ImportError:
      version_info = ( 0, 0 )   # a really early version
  from time import time
  from select import select
  from asyncore import socket_map
  from pysnmp.carrier.base import AbstractTransportDispatcher
  
  # Old asyncore doesn't allow socket_map param at poll
  if version_info < (2, 0):
      def poll(timeout, socket_map):
          if not socket_map:
              return
          sockets = socket_map.keys()
          r = filter(lambda x: x.readable(), sockets)
          w = filter(lambda x: x.writable(), sockets)
  
          (r,w,e) = select(r, w, [], timeout)
  
          for x in r:
              try:
                  x.handle_read_event()
              except:
                  x.handle_error()
          for x in w:
              try:
                  x.handle_write_event()
              except:
                  x.handle_error()
  else:
      from asyncore import poll
  
  class AsynsockDispatcher(AbstractTransportDispatcher):
      """Implements I/O over asynchronous sockets"""
      def __init__(self):
          self.__sockMap = {} # use own map for MT safety
          self.timeout = 1.0
          AbstractTransportDispatcher.__init__(self)
  
      def getSocketMap(self): return self.__sockMap
      def setSocketMap(self, sockMap=socket_map): self.__sockMap = sockMap
      
      def registerTransport(self, tDomain, t):
          AbstractTransportDispatcher.registerTransport(self, tDomain, t)
          t.registerSocket(self.__sockMap)
  
      def unregisterTransport(self, tDomain):
          self.getTransport(tDomain).unregisterSocket(self.__sockMap)
          AbstractTransportDispatcher.unregisterTransport(self, tDomain)
  
      def transportsAreWorking(self):
          for transport in self.__sockMap.values():
              if transport.writable():
                  return 1
          return 0
      
      def runDispatcher(self, timeout=0.0):
          while self.jobsArePending() or self.transportsAreWorking():
              poll(self.timeout, self.__sockMap)
              self.handleTimerTick(time())
  
new_contents: try:
      from sys import version_info
  except ImportError:
      version_info = ( 0, 0 )   # a really early version
  from time import time
  from select import select
  from asyncore import socket_map
  from pysnmp.carrier.base import AbstractTransportDispatcher
  
  # Old asyncore doesn't allow socket_map param at poll
  if version_info < (2, 0):
      def poll(timeout, socket_map):
          if not socket_map:
              return
          sockets = socket_map.keys()
          r = filter(lambda x: x.readable(), sockets)
          w = filter(lambda x: x.writable(), sockets)
  
          (r,w,e) = select(r, w, [], timeout)
  
          for x in r:
              try:
                  x.handle_read_event()
              except:
                  x.handle_error()
          for x in w:
              try:
                  x.handle_write_event()
              except:
                  x.handle_error()
  else:
      from asyncore import poll
  
  class AsynsockDispatcher(AbstractTransportDispatcher):
      """Implements I/O over asynchronous sockets"""
      def __init__(self):
          self.__sockMap = {} # use own map for MT safety
          self.timeout = 1.0
          AbstractTransportDispatcher.__init__(self)
  
      def getSocketMap(self): return self.__sockMap
      def setSocketMap(self, sockMap=socket_map): self.__sockMap = sockMap
      
      def registerTransport(self, tDomain, t):
          AbstractTransportDispatcher.registerTransport(self, tDomain, t)
          t.registerSocket(self.__sockMap)
  
      def unregisterTransport(self, tDomain):
          self.getTransport(tDomain).unregisterSocket(self.__sockMap)
          AbstractTransportDispatcher.unregisterTransport(self, tDomain)
  
      def transportsAreWorking(self):
          for transport in self.__sockMap.values():
              if transport.writable():
                  return 1
          return 0
      
      def runDispatcher(self, timeout=0.0):
          while self.jobsArePending() or self.transportsAreWorking():
              poll(timeout and timeout or self.timeout, self.__sockMap)
              self.handleTimerTick(time())
  
subject: fix to runDispatcher() to make use of optional non-default timeout value.