Question

这个免费提供的代码是一个秒表GUI应用程序。按下停止按钮后，如何将单个变量的分钟，秒和毫秒分配为m，s，ms？

对于初学者，我在Stop函数中尝试了m = self.timestr.get()[0:2]，但无论分钟数如何，值始终为00。

from Tkinter import *
import time

class StopWatch(Frame): 
    """ Implements a stop watch frame widget. """                                                               
    def __init__(self, parent=None, **kw):       
        Frame.__init__(self, parent, kw)
        self._start = 0.0       
        self._elapsedtime = 0.0
        self._running = 0
        self.timestr = StringVar()              
        self.makeWidgets()     

    def makeWidgets(self):                        
        """ Make the time label. """
        l = Label(self, textvariable=self.timestr)
        self._setTime(self._elapsedtime)
        l.pack(fill=X, expand=NO, pady=2, padx=2)                     

    def _update(self):
        """ Update the label with elapsed time. """
        self._elapsedtime = time.time() - self._start
        self._setTime(self._elapsedtime)
        self._timer = self.after(50, self._update)

    def _setTime(self, elap):
        """ Set the time string to Minutes:Seconds:Hundreths """
        minutes = int(elap/60)
        seconds = int(elap - minutes*60.0)
        hseconds = int((elap - minutes*60.0 - seconds)*100)               
        self.timestr.set('%02d:%02d:%02d' % (minutes, seconds, hseconds))

    def Start(self):                                                    
        """ Start the stopwatch, ignore if running. """
        if not self._running:           
            self._start = time.time() - self._elapsedtime
            self._update()
            self._running = 1       

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

    def Reset(self):                                 
        """ Reset the stopwatch. """
        self._start = time.time()        
        self._elapsedtime = 0.0   
        self._setTime(self._elapsedtime)


def main():
    root = Tk()
    sw = StopWatch(root)
    sw.pack(side=TOP)

    Button(root, text='Start', command=sw.Start).pack(side=LEFT)
    Button(root, text='Stop', command=sw.Stop).pack(side=LEFT)
    Button(root, text='Reset', command=sw.Reset).pack(side=LEFT)
    Button(root, text='Quit', command=root.quit).pack(side=LEFT)

    root.mainloop()

if __name__ == '__main__':
    main()

Answer 1

在_setTimer中创建

 minutes = int(elap/60)
 seconds = int(elap - minutes*60.0)
 hseconds = int((elap - minutes*60.0 - seconds)*100)

所以请使用self.minutes，self.seconds，self.hseconds，您不必使用self.timestr.get()

如何将秒表单位分配给变量

1 个答案: