How to call back methods in python?

Question

I am making a project in which whenever I stop the stopwatch, it updates the time into a Listbox. It can be updated in the self.m listbox. However it cannot be updated into topscoreslistbox.

In the printFunctionStop function, i call back the Stop method in a class. However i do not know how to call the TopscoresStop in the main function.

The Stop method and TopscoresStop method do the same thing. However the different thing is one is in the class and one is in the main function.

So how do i call the method TopscoresStop in the main function in printFunctionStop anyone knows?

class StopWatch(Frame):  
    def Stop(self):                                    
        """ Stop the stopwatch, ignore if stopped. """
        tempo = self._elapsedtime - self.lapmod2
        if self._running:
            self.after_cancel(self._timer)            
            self._elapsedtime = time.time() - self._start    
            self._setTime(self._elapsedtime)
            self._running = 0

        if len(self.laps) == 3:
            return

        self.laps.append(self._setLapTime(tempo))
        self.m.insert(END, (str(self.one.get()) , "%.2f" % self._elapsedtime))
        self.m.yview_moveto(1)

def main():
    def Topscores():
        toplevel() = Toplevel()
        toplevel.title("Top Scores")
        topscoreslistbox = Listbox(toplevel, selectmode=EXTENDED, height=3, width=20, font=("Helvetica", 26))                   
        topscoreslistbox.pack(side=RIGHT, fill=BOTH, expand=1, pady=5, padx=2)

        first = Label(toplevel, text=("1st"), font=("Algerian", 30))
        first.pack(side=TOP)

        second = Label(toplevel, text=("2nd"), font=("Algerian", 30))
        second.pack(side=TOP)     

        third = Label(toplevel, text=("3rd"), font=("Algerian", 30))
        third.pack(side=TOP)          

    def TopscoresStop():
        tempo = sw._elapsedtime - sw.lapmod2
        if sw._running:
            sw.after_cancel(sw._timer)            
            sw._elapsedtime = time.time() - sw._start    
            sw._setTime(sw._elapsedtime)
            sw._running = 0

        if len(sw.laps) == 3:
            return

        sw.laps.append(sw._setLapTime(tempo))
        topscoreslistbox.insert(END, (str(sw.one.get()) , "%.2f" % sw._elapsedtime))
        topscoreslistbox.yview_moveto(1)

    def printFunctionStop(channel):

        sw.event_generate("<<Stop>>", when = "tail")    

    GPIO.add_event_detect(16, GPIO.FALLING, callback = printFunctionStop, bouncetime=300)
    sw.bind("<<Stop>>", lambda event:sw.Stop())

fgoettel · Accepted Answer · 2015-05-15 06:23:41Z

1

Have you tried passing the function as an argument to printfunctionstop?

sorry, can't make comments yet.

E.g.

def a():
    print('hi')

def b(func):
    func()

def main():
    b(a)

main()

The main should print 'hi'

edited May 15, 2015 at 6:23

answered May 12, 2015 at 10:17

fgoettel

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