Question

我正在使用小部件构建一个简单的程序，该程序将根据某人的分数显示其分数。例如。 5 = A，4 = B ... 1＆0 = F。

我的程序面临的一个问题是在输入框中输入分数后，将结果显示在标签中。我最初运行程序时，它是根据分数显示成绩的，而不是根据Entry框显示的。

我为您提供了无数涉及输入框的视频，但没有一个起作用。我还尝试将成绩（“成绩”）设置为与输入框（entry）相等。

这是我的程序：

'''Program to connect entry to button and output results'''

import tkinter as tk

constant = tk.Tk()

def put_grade():

    entry = tk.Entry(constant)
    entry.place(relx = .4, rely = .1, relwidth = .2, relheight = .1)

    values = [5, 4, 3, 2, 1, 0]
    grades = ["A", "B", "C", "D", "F", "F"]

    # Source of problem
    grade = entry

    done = False
    index = 0

    while not done:

        if values[index] == grade:

            grade = grades[index]
            done = True

        index += 1

    return grade

def get_grade(grade):

    label = tk.Label(constant, bg = "light blue", text = grade)
    label.place(relx = .4, rely = .2, relwidth = .2, relheight = .5)

def button_clicked():

    button = tk.Button(constant, bg = "light green", text = "Check grade", command = put_grade)
    button.place(relx = .4, rely = .6, relwidth = .2, relheight = .1)

def main():

    grade = put_grade()
    get_grade(grade)
    button_clicked()
    tk.mainloop()

if __name__ == '__main__':

    main()

如果有人需要对我的代码或预期的输出做进一步的说明，我将很高兴进行澄清。

Answer 1

这是原始代码的某种修改版本。您可以解决其余的逻辑问题。

'''Program to connect entry to button and output results'''

import tkinter as tk

values = [5, 4, 3, 2, 1, 0]
grades = ["A", "B", "C", "D", "F", "F"]

root = tk.Tk()

def put_grade(entry,label):
    grade=entry.get()
    try:
        grade=int(grade)
    except Exception as e:
        grade=0

    done = False  
    index = 0
    while not done:
        if values[index] == grade:
            grade = grades[index]
            done = True
        index += 1

    label.config(text=grade)
    
def make_gui(root):
    entry = tk.Entry(root)
    entry.place(relx = .4, rely = .1, relwidth = .2, relheight = .1)
    label = tk.Label(root, bg = "light blue", text = "0")
    label.place(relx = .4, rely = .2, relwidth = .2, relheight = .5)
    button = tk.Button(root, bg = "light green", text = "Check grade", command = lambda:put_grade(entry,label))
    button.place(relx = .4, rely = .6, relwidth = .2, relheight = .1)

def main():
    make_gui(root)
    tk.mainloop()

if __name__ == '__main__':
    main()

如何使用Entry小部件显示输出？

1 个答案: