Question

我对python很新，我试图为自己做一个小项目，但我不明白如何使用stop函数中start函数的初始时间变量我可以用它来做数学。这是我目前的代码：

import time
import Tkinter
import tkMessageBox

top = Tkinter.Tk()

def start_time():
   tkMessageBox.showinfo("Timer", "The timer will now begin")
   initial = time.time()
   return initial

def stop_time(initial):
   final = time.time()
   tkMessageBox.showinfo("Timer", final - initial)

Start = Tkinter.Button(top, text ="Start", command = start_time)
Stop = Tkinter.Button(top, text ="Stop", command = stop_time)
Start.pack()
Stop.pack()
top.mainloop()

Answer 1

您的功能需要就共享数据的共同位置达成一致。对于这个简单的例子，模块的全局命名空间是一个不错的选择。您需要做的就是将global initial添加到更新它的函数中。对于较大的项目，您可以移动到包含变量的对象和更新它的函数，但这对您的目标来说很好。

import time
import Tkinter
import tkMessageBox

initial = 0

top = Tkinter.Tk()

def start_time():
   global initial
   tkMessageBox.showinfo("Timer", "The timer will now begin")
   initial = time.time()
   return initial

def stop_time():
   # you could check for initial == 0 and display an error
   final = time.time()
   tkMessageBox.showinfo("Timer", final - initial)

Start = Tkinter.Button(top, text ="Start", command = start_time)
Stop = Tkinter.Button(top, text ="Stop", command = stop_time)
Start.pack()
Stop.pack()
top.mainloop()

如何测量python与tkinter按下按钮之间的经过时间？

1 个答案: