python和小时公式计算

发布时间：2020-12-20 11:22:02 所属栏目：Python 来源：网络整理

导读：我有一些工作代码,我改变了,但我似乎无法得到小时变量的数学.我想假期我需要很多食物,因为我想要一个空白. ## {{{ http://code.activestate.com/recipes/124894/ (r2)from Tkinter import *import timeimport pygtkimport gtkimport timeclass StopWatch(Fra

我有一些工作代码,我改变了,但我似乎无法得到小时变量的数学.我想假期我需要很多食物,因为我想要一个空白.

## {{{ http://code.activestate.com/recipes/124894/ (r2)
from Tkinter import *
import time
import pygtk
import gtk
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 """
        hours = int(elap) #cant remember formula 
        minutes = int(elap/60)
        seconds = int(elap - minutes*60.0)
        hseconds = int((elap - minutes*60.0 - seconds)*100)
        sn = time.strftime('%m/%d/%Y-%H:%M:%S')                
        self.timestr.set('%02snn%02dh:%02dm:%02ds:%02d' % (sn,hours,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()
    root.title( "Stop Watch" )
    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()
## end of http://code.activestate.com/recipes/124894/ }}}

解决方法

我从方程式推断出elap是以秒为单位测量的.由于您将小时数提取到单独的变量中,因此需要从分钟计数中删除它们.当然,由于分钟的含义与原始代码有所不同,因此您需要在计算的其余部分中遵循此操作.

hours = int(elap/3600)
minutes = int((elap-hours*3600)/60)
seconds = int(elap-hours*3600-minutes*60)
hseconds = int((elap-hours*3600-minutes*60-seconds)*100)

我想如果我写这篇文章,我会修改elap,因为我一直在努力减少重复.

hours = int(elap/3600)
elap -= hours*3600
minutes = int(elap/60)
elap -= minutes*60
seconds = int(elap)
elap -= seconds
hseconds = int(elap*100)

这样做可以更容易地看到正在发生的事情,并且将来也更容易修改.例如,如果您想在混合中添加天数,那么您需要做的就是将其移植到代码的开头：

days = int(elap/86400)
elap -= days*86400

现在,我在这里编写了代码,假设elap是一个浮点数,当然它在你的程序中.如果你特别偏执,你会在执行算术之前编写elap = float(elap).

但我同意@soulcheck认为使用库函数更清晰.

（编辑：李大同）

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