Python Tkinter Button with If Else statements

Question

我想用 2 个可能的函数绑定Start_Button：

如果单击Choice_1_Button，然后单击Start_Button，则Start_Button应调用foo1。但是当用户单击Choice_2_Button时，同一Start Button应调用foo2。

这是我目前拥有的代码：

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

传递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。

如果要使用单选按钮，它将使其更容易：

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()