detector.py

class Detector:
    def __init__(self):
        self.detectors = []
        self._pending = []
        self.matches = []
        
    def feed_input(self, obj, index):
        """After instantiating Detector and adding individual detector coroutines, call
        feed_input(obj, index) over and over until you are done.  You should end with a 
        sentinal obj.  Look in .matches to get the results.
        
        Detectors should be implemented like:
        
        def detector(data, obj):
            next_obj = yield if_obj_was_okay
            next_obj2 = yield if_next_obj_was_okay
            return # returning means successful conclusion
            # Add info to the data dict at any time
        """
        for checker, data in list(self._pending):
            try:
                result = checker.send(obj)
            except StopIteration:
                # Success!
                self.matches.append(data)
                result = False
            if not result:
                self._pending.remove((checker, data))
        for detector in self.detectors:
            data = {"index": index, "detector": detector}
            checker = detector(data, obj)
            # Then we have to prime the checker...
            result = next(checker)
            if not result:
                self._pending.append((checker, data))

def three_clicks(data, ev):
    ev = yield ev.type == "click"
    ev = yield ev.type == "click"
    ev = yield ev.type == "click"
  
def menu_click_then_other_click(data, ev):
    ev = yield ev.type == "click" and ev.target.name == "Menu"
    ev = yield ev.type == "click" and ev.target != "Menu"