docs: def handle_event(self, act):
          """
          Handle completion for a request.
  
          Calls the scheduler to run or schedule the associated coroutine.
          """
          scheduler = self.scheduler
          if act in self.tokens:
              coro = act.coro
              op = self.try_run_act(act, self.tokens[act])
              if op:
                  del self.tokens[act]
                  if scheduler.ops_greedy:
                      while True:
                          op, coro = scheduler.process_op(coro.run_op(op, scheduler), coro)
                          if not op and not coro:
                              break
                  else:
                      if op.prio & priority.OP:
                          op, coro = scheduler.process_op(coro.run_op(op, scheduler), coro)
                      if coro and op:
                          if op.prio & priority.CORO:
                              scheduler.active.appendleft( (op, coro) )
                          else:
                              scheduler.active.append( (op, coro) )
              else:
                  return
          else:
              import warnings
              warnings.warn("Got event for unkown act: %s" % act)
          return True