Question

我是编程新手，几乎没有几个月的学习经验。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。

我正在使用在这里找到的Tkinter秒表应用程序：“ https://www.geeksforgeeks.org/create-stopwatch-using-python/” 我做了一些实验和QoL更改后对其进行了轻微修改。

我的想法是添加一个“议程”按钮，在这里我可以看到我输入的总时间（不同的会话）。 “重置”算作另一个学习会话。

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。问题在这段代码内：

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

在这里，您需要先增加计数器，然后再将值保存为总计，并且由于某种原因，您还会使用last_session_duration两次。

如果将此部分更改为此，您将获得上一会话的持续时间：

session = counter
total = session
counter += 1

无论如何，您可能想要玩得更多，以显示总计时间。

对抗Python中的异常行为

1 个答案: