Counter Python中的不当行为

Question

我是编程新手，几乎没有几个月的学习时间。我正在尝试构建一个简单的应用程序来计算我投入学习的时间。

我

正在使用我在这里找到的 Tkinter 秒表应用程序："https://www.geeksforgeeks.org/create-stopwatch-using-python/"我稍微修改了一下，以进行一些实验和 QoL 更改。

我

的想法是添加一个"议程"按钮，我可以在其中查看我投入的总时间（不同的会话）。"重置"计为不同的学习会话。

问题

/问题："议程"返回奇怪的数字，与两个会话中注册的总秒数无关。

import tkinter as Tkinter
counter = 0
running = False
total = 0

def counter_label(label):
    def count():
        if running:
            global counter
            global total
            # To manage the intial delay.
            if counter == 0:
                display = "Starting..."
            else:
                display = str(counter)
            label['text'] = display  # Or label.config(text=display)
            # label.after(arg1, arg2) delays by
            # first argument given in milliseconds
            # and then calls the function given as second argument.
            # Generally like here we need to call the
            # function in which it is present repeatedly.
            # Delays by 1000ms=1 seconds and call count again.
            label.after(1000, count)
            counter += 1
            session = counter
            total = session + session
    # Triggering the start of the counter.
    count()

def total_count():
    global total
    display = str(total)
    label['text'] = display

# start function of the stopwatch
def Start(label):
    global running
    running = True
    counter_label(label)
    start['state'] = 'disabled'
    stop['state'] = 'normal'
    reset['state'] = 'normal'

# Stop function of the stopwatch
def Stop():
    global running
    start['state'] = 'normal'
    stop['state'] = 'disabled'
    reset['state'] = 'normal'
    running = False
    if running == False:
        start['text'] = 'Resume'

# Reset function of the stopwatch
def Reset(label):
    global counter
    counter = 0
    # If rest is pressed after pressing stop.
    if running == False:
        reset['state'] = 'disabled'
        label['text'] = 'Welcome!'
        start['text'] = 'Start'
    # If reset is pressed while the stopwatch is running.
    else:
        label['text'] = 'Starting...'

def Agenda():
    global total
    start['state'] = 'normal'
    stop['state'] = 'normal'
    reset['state'] = 'normal'
    global total
    display = str(total)
    label['text'] = display

root = Tkinter.Tk()
root.title("Stopwatch")
# Fixing the window size.
root.minsize(width=250, height=70)
label = Tkinter.Label(root, text="Welcome!", fg="black", font="Verdana 30 bold")
label.pack()
start = Tkinter.Button(root, text='Start',
                       width=15, command=lambda: Start(label))
stop = Tkinter.Button(root, text='Stop',
                      width=15, state='disabled', command=Stop)
reset = Tkinter.Button(root, text='Reset',
                       width=15, state='disabled', command=lambda: Reset(label))
agenda = Tkinter.Button(root, text='Agenda', width=15, command=Agenda)
start.pack()
stop.pack()
reset.pack()
agenda.pack()
root.mainloop()

Answer 1

实际上，您的议程按钮显示如下内容：agenda = (last_session_duration +1) * 2 。问题出在这段代码中：

counter += 1
session = counter
total = session + session

在这里，您在将值保存到总计之前递增计数器，并且出于某种原因，您也使用last_session_duration两次。

如果将此部分更改为此部分，您将获得上次会话的持续时间：

session = counter
total = session
counter += 1

无论如何，您可能想玩更多以获得显示总时间的总时间。