Tkinter 从 Checkbutton 中获取值选择答案

【问题标题】：Tkinter obtain the value select from CheckbuttonTkinter 从 Checkbutton 中获取值选择
【发布时间】：2020-09-30 18:13:37
【问题描述】：

我是 tkinter 的新手，我正在尝试从复选按钮获取值选择到我的其他脚本，但在我选择并单击“选择”按钮后，它一直向我显示下面的错误。

这是我的脚本：

from tkinter import * 

root = Tk()

options =  ["All","Happy","Sad","Angry","Emotional","Disgust","None of above"]

message = Label(root, text ='Select how you feel today: ')
message.pack()

for x in range(len(options)):
    choose = Checkbutton(root, text= options[x]).pack(anchor=W)
        

def selected():
    print(choose.get())
        
result = Button(root, text='Select', width=15, command = selected).pack(pady =6, anchor=SE)
cancel = Button(root, text='Cancel', width=15, command = root.destroy).pack(pady=6,anchor=SE)

root.mainloop()

  File "C:\Users\Desktop\Python\temp.py", line 22, in selected
    print(choose.get())
AttributeError: 'NoneType' object has no attribute 'get'

我需要如何更改我的代码，以便我可以从我的复选框中获取我勾选的值？

【问题讨论】：

标签： python tkinter

【解决方案1】：

每个复选框都需要变量。我的建议是将这些变量存储在字典 all_vars 中，以便您可以轻松访问它们：

from tkinter import * 

root = Tk()

options =  ["All","Happy","Sad","Angry","Emotional","Disgust","None of above"]

message = Label(root, text ='Select how you feel today: ')
message.pack()

all_vars = {}
for opt in options:
    var = IntVar()
    choose = Checkbutton(root, text=opt, variable=var).pack(anchor=W)
    all_vars[opt] = var
        

def selected():
    for opt in options:
        print(opt, all_vars[opt].get())
        
result = Button(root, text='Select', width=15, command = selected).pack(pady =6, anchor=SE)
cancel = Button(root, text='Cancel', width=15, command = root.destroy).pack(pady=6,anchor=SE)

root.mainloop()

输出（如果被选中，你会得到1，如果不是，你会得到0）：

All 0
Happy 0
Sad 0
Angry 0
Emotional 0
Disgust 0
None of above 0
All 0
Happy 0
Sad 0
Angry 1
Emotional 0
Disgust 0
None of above 0

【讨论】：