Question

我是python的新手。基本上我做这个GUI是为了记录汽车的圈时间。一旦赛车完成第一圈，我就要记录一圈的时间。随后的圈数也需要记录。录制的时间将显示在列表框中。但是，我不知道如何从最快的实验室时间到最慢的实验室时间对时间进行排序。有人可以帮帮我吗？

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.e = 0
            self.m = 0
            self.makeWidgets()
            self.laps = []
            self.lapmod2 = 0
            self.today = time.strftime("%d %b %Y %H-%M-%S", time.localtime())

    def makeWidgets(self):                         
            """ Make the time label. """
            l1 = Label(self, text='----File Name----')
            l1.pack(fill=X, expand=NO, pady=1, padx=2)

            self.e = Entry(self)
            self.e.pack(pady=2, padx=2)

            l = Label(self, textvariable=self.timestr)
            self._setTime(self._elapsedtime)
            l.pack(fill=X, expand=NO, pady=3, padx=2)

            l2 = Label(self, text='----Laps----')
            l2.pack(fill=X, expand=NO, pady=4, padx=2)

            scrollbar = Scrollbar(self, orient=VERTICAL)
            self.m = Listbox(self,selectmode=EXTENDED, height = 10,font=("Helvetica", 12),yscrollcommand=scrollbar.set)
            self.m.pack(side=LEFT, fill=BOTH, expand=1, pady=5, padx=2)
            scrollbar.config(command=self.m.yview)
            scrollbar.pack(side=RIGHT, fill=Y)

        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 _setLapTime(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)            
            return '%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.laps = []   
            self._setTime(self._elapsedtime)

        def Lap(self):
            '''Makes a lap, only if started'''  
            tempo = self._elapsedtime - self.lapmod2
            if self._running:
                    self.laps.append(self._setLapTime(tempo))
                    self.m.insert(END, self.laps[-1])

                    self.m.yview_moveto(1)
                    self.lapmod2 = self._elapsedtime

        def GravaCSV(self):
            arquivo = str(self.e.get()) + ' - '
            with open(arquivo + self.today + '.txt', 'wb') as lapfile:
                    for Lap in self.laps:
                        lapfile.write((bytes(str(Lap) + '\n', 'utf-8')))


def main():
        root = Tk()
        root.wm_attributes("-topmost", 1)     
        sw = StopWatch(root)
        sw.pack(side=TOP)

        Button(root, text='Lap', command=sw.Lap).pack(side=LEFT)
        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='Save', command=sw.GravaCSV).pack(side=LEFT)
        Button(root, text='Quit', command=root.quit).pack(side=LEFT)    

        root.mainloop()

if __name__ == '__main__':
        main()

Answer 1

通常，经过的时间将存储在列表中，然后列表将按您想要的顺序排序。我不知道你是否已经做过这些，但就像在现有列表上的一个简单示例一样，试试这个并在文件中查看结果https://wiki.python.org/moin/HowTo/Sorting

    def GravaCSV(self):
        arquivo = str(self.e.get()) + ' - '
        self.laps.sort()
        """ next sort as numbers instead of strings (not tested)
            and then sort and write laps_as_num to file
        laps_as_num=[]
        for this_lap in laps:
            lap=this_lap.split(":")
            laps_as_num.append([int(lap[0]), int(lap[1]), int(lap[2])])
        """
        with open(arquivo + self.today + '.txt', 'wb') as lapfile:
                for Lap in self.laps:
                    lapfile.write((bytes(str(Lap) + '\n', 'utf-8')))

如何按顺序排序时间？

1 个答案: