class EventObj:
   "sample class for dealing with events"
#
# Event handlers
#
   def touch(self, s):
      print 'Touched by ' + s
   def wounded(self, pts, part):
      print'Wounded at ' + part + ' by %(pts)d points' % vars()
#
# Insert event at the end of list
#
   def newEvent(self, evtName, *args):    # Keep incoming event for processing
      if self.evtTable.has_key(evtName):  #  if event exists in evtTable,
         evtTuple = (evtName, args)       #    make the event structure, and
         self.evtQueue.append(evtTuple)   #    insert it at the queue end
#
# Returns true if queue is empty
#
   def hasEvents(self):
      return self.evtQueue != []
#
# Process next event
#
   def forceEvent(self):                  # Force next event to be processed
      evt = self.evtQueue[0]              #  get next event, and
      self.evtQueue.remove(evt)           #  remove it from queue
                                          #
         # separate event methods by argument number (not pretty, I now...)
      if self.evtTable[evt[0]][1] == 0:
         self.evtTable[evt[0]][0]()
      if self.evtTable[evt[0]][1] == 1:
         self.evtTable[evt[0]][0](evt[1][0])
      if self.evtTable[evt[0]][1] == 2:
         self.evtTable[evt[0]][0](evt[1][0], evt[1][1])
      if self.evtTable[evt[0]][1] == 3:
         self.evtTable[evt[0]][0](evt[1][0], evt[1][1], evt[1][2])
      # ... until max argument list allowed
#
   def __init__(self):
          # evtTable associates an event name with a tuple (function, n-args)
      self.evtTable = {'touch'   : (self.touch, 1),    
                       'wounded' : (self.wounded, 2) }
      self.evtQueue = [] 

class newEventObj(EventObj):
   "An extended class with a new event"
#
   def patrol(self):
      print 'Patrolling'
#
   def __init__(self):
          # superclass init method. This call reuses all important
          #  data structures of superclass, like evtQueue
      self.__class__.__bases__[0].__init__(self)
          # add new event to this subclass
      self.evtTable['healed'] = (self.patrol, 0)

#####################

x = EventObj()
y = newEventObj()

x.newEvent('touch', 'dragon')
x.newEvent('wounded',500,'head')
y.newEvent('touch', 'troll')
y.newEvent('touch', 'orc')
y.newEvent('wounded',400,'right leg')
y.newEvent('healed')

print '='*40
print x.evtTable
print x.evtQueue
print '-'*40
print y.evtTable
print y.evtQueue
print '='*40

while x.hasEvents():
   x.forceEvent()

while y.hasEvents():
   y.forceEvent()