Question

我想将Start_Button与两个可能的函数绑定：

如果点击Choice_1_Button，然后点击Start_Button，则Start_Button应致电foo1。但是，当用户点击Choice_2_Button时，相同的Start Button应该调用foo2。

以下是我目前的代码：

from tkinter import *
root=Tk()
Choice_1_Button=Button(root, text='Choice 1', command=something) #what should it do?
Choice_2_Button=Button(root, text='Choice 2', command=something_else)
Start_Button=Button(root, text='Start', command=if_something) #and what about this?

有谁知道something，something_else和if-something应该做什么？

Answer 1

以下代码会跟踪他们按下的内容：

choice=None
def choice1():
    global choice
    choice='Choice 1'
def choice2():
    global choice
    choice='Choice 2'
def start():
    global choice
    if choice=='Choice 1':
        foo1()
    elif choice=='Choice 2':
        foo2()
    else:
        #do something else since they didn't press either

将choice1作为Choice_1_Button的命令，choice2作为Choice_2_Button的命令，start作为Start_Button的命令。

如果您想使用单选按钮，它会更容易：

def start(choice):
    if choice=='Choice 1':
        foo1()
    elif choice=='Choice 2':
        foo2()
    else:
        #do something else since they didn't press either
var=StringVar(root)
var.set(None)
Radiobutton(root, text='Choice 1', value='Choice 1', variable=var).pack()
Radiobutton(root, text='Choice 2', value='Choice 2', variable=var).pack()
Button(self.frame, text='Start', command=lambda: start(var.get())).pack()

带有If Else语句的Python Tkinter Button

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