分析tinyos sdk中python解析的一段代码：https://github.com/tinyos/tinyos-main/blob/master/support/sdk/python/tinyos/message/MoteIF.py#L60 构造的字典

gistfile1.txt

def addListener(self, listener, msgClass):
        if listener not in self.listeners:
            self.listeners[listener] = {}

        amTypes = self.listeners[listener]
        amTypes[msgClass.get_amType()] = msgClass
        
 def dispatchPacket(self, source, packet):
      ...
        for l in self.listeners:
            amTypes = self.listeners[l]
            if amType in amTypes:
                try:
                    msgClass = amTypes[amType]
                    msg = msgClass(data=data,
                                   data_length = len(data),
                                   addr=serial_pkt.get_header_src(),
                                   gid=serial_pkt.get_header_group())
                    l.receive(source, msg)
                except Exception, x:
                    print >>sys.stderr, x
                    print >>sys.stderr, traceback.print_tb(sys.exc_info()[2])

################################
#数据格式

listeners = {
  listener : {
      msgClass.get_amType(): msgClass
      ...
  }
  listener : {
      msgClass.get_amType(): msgClass
      ...
  }
  ...
}