为什么我的 Tkinter 按钮没有执行我的功能？

Question

from tkinter import *
import random
from collections import Counter

root = Tk()
root.title("Random")
root.geometry("600x400")
root.resizable(False, False)


def open_saw():
    saw_wn = Tk()
    saw_wn.title("Random App - Spin a Wheel")
    saw_wn.geometry("600x400")
    saw_wn.resizable(False, False)

    saw_wn.mainloop()


def open_coin():
    c_wn = Tk()
    c_wn.title("Random App - Flip a Coin")
    c_wn.geometry("600x400")
    c_wn.resizable(False, False)

    Label(c_wn, text="                                                                                ").grid(row=0,
                                                                                                              column=0)
    Label(c_wn, text="Flip the coin below!", font=("Yu Gothic UI", 12)).grid(row=0, column=1)

    Label(c_wn, text='                    ').grid(row=1, column=1)

    coin_values = ["Heads", "Tails"]
    coin_face = random.choice(coin_values)

    def flip():
        if coin_face == "Heads":
            Label(c_wn, text="Coin: Heads").place(anchor='s')
        else:
            Label(c_wn, text="Coin: Tails").place(anchor='s')
    coin = Button(c_wn, text='coin', padx=100, pady=90, command=flip)
    coin.place(relx=0.5, rely=0.5, anchor=CENTER)

    c_wn.mainloop()


def open_average():
    avg_wn = Tk()
    avg_wn.title("Random App - Averages")
    avg_wn.geometry("840x300")

    Label(avg_wn, text="              ").grid(row=0, column=0)
    avg_instruct = Label(avg_wn, text="Enter your values below to get the averages in mean, median, and mode(put a "
                                      "space between commas")
    avg_instruct.config(font=("Yu Gothic UI", 10))
    avg_instruct.grid(row=0, column=1)

    Label(avg_wn, text="                                     ").grid(row=1, column=0)
    entry = Entry(avg_wn)
    entry.grid(row=2, column=1)

    def calculate():
        list_data = entry.get().split(', ')
        list_data = [float(i) for i in list_data]
        mean = sum(list_data) / len(list_data)
        Label(avg_wn, text='Mean').grid(row=5, column=0)
        Label(avg_wn, text=str(mean)).grid(row=6, column=0)

        list_data_len = len(list_data)
        list_data.sort()

        if list_data_len % 2 == 0:
            median1 = list_data[list_data_len // 2]
            median2 = list_data[list_data_len // 2 - 1]
            median = (median1 + median2) / 2
        else:
            median = list_data[list_data_len // 2]
        Label(avg_wn, text='Median: ' + str(median)).grid(row=5, column=1)
        Label(avg_wn, text=median).grid(row=6, column=1)
        list_data_for_mode = Counter(list_data)
        get_mode = dict(list_data_for_mode)
        mode = [k for k, v in get_mode.items() if v == max(list(list_data_for_mode.values()))]

        if len(mode) == list_data_len:
            get_mode = ["No mode found"]
        else:
            get_mode = [str(i) for i in mode]

        Label(avg_wn, text="Mode: ").grid(row=5, column=2)
        Label(avg_wn, text=get_mode[0]).grid(row=6, column=2)

    Label(avg_wn, text="                                     ").grid(row=3, column=0)

    Button(avg_wn, text='Enter', command=calculate).grid(row=4, column=1)


Label(root, text="                                                          ").grid(row=0, column=0)

title = Label(root, text="Welcome to Random")
title.config(font=("Yu Gothic UI", 24))
title.grid(row=0, column=1)

button1 = Button(root, text="             Spin a wheel             ", padx=80, pady=25, command=open_saw)
button1.place(x=2.25, y=100)

button2 = Button(root, text="Calculate mean, mode, median, and range", padx=20, pady=25, command=open_average)
button2.place(x=325, y=100)

button3 = Button(root, text="Flip a Coin", padx=125, pady=25, command=open_coin)
button3.place(x=2.25, y=200)

button4 = Button(root, text="Generate a number", padx=82, pady=25)
button4.place(x=325, y=200)

root.mainloop()

我想要函数显示正面或反面（随机）。相反，该函数不显示任何内容并忽略该函数。我也试过打印值而不是在 tkinter 上显示它，但它只显示正面而不显示反面。如果需要任何其他详细信息来解决我的问题，请发表评论，我将提供其他详细信息。

Answer 1

在函数 open_coin 中，当单击按钮 coin 时，您正在创建 label 但未在 place 中指定 x 和 y 坐标，并且每次按下按钮时也会创建。因此，创建一个标签来显示结果并使用 config.

不断更改其文本

而random函数只被调用一次，所以把它放在flip函数中，每次都调用以获得新的随机硬币值。

    .
    .
    CoinLabel = Label(c_wn, text="")  #will be used to display the result
    CoinLabel.place(relx=0.5, rely=0.2, anchor='s')
    
    def flip():
        coin_values = ["Heads", "Tails"]
        coin_face = random.choice(coin_values)
        print(coin_face)
        if coin_face == "Heads":
            CoinLabel.config(text="Coin: Heads")
        else:
            CoinLabel.config(text="Coin: Tails")
    coin = Button(c_wn, text='coin', padx=100, pady=90, command=flip)
    coin.place(relx=0.5, rely=0.5, anchor=CENTER)
    .
    .

为什么我的 Tkinter 按钮没有执行我的功能？

Why is my Tkinter button not executing my function?

python

random

tkinter

tkinter-button