tkinter example 1-radio (snippet)

Python tkinter (gui) example '1-radio'

Functions in program:

• def print_selection():

Modules used in program:

• import tkinter as tk

1-radio

Python tkinter example: 1-radio

# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import tkinter as tk


'''
显示一个复项单选框. 有多个选项, 但是每次只能选择一个
栏目, 然后打印到标签上.
'''

window = tk.Tk()
window.title('My Window')
window.geometry('200x200')

var = tk.StringVar()
lbl = tk.Label(
        window,
        bg='yellow',
        width=20,
        text='empty'
    )

def print_selection():
    # 除了 textvatiable, 另一种动态显示 label 的方法
    # 就是调用方法 config.
    lbl.config(text='You have selected ' + var.get())

# 这些 RadioButton 是以 var 为标准单选的.
rA = tk.Radiobutton(
        window,
        text='Option A',
        variable=var, value='A',
        command=print_selection
    )
rB = tk.Radiobutton(
        window,
        text='Option B',
        variable=var, value='B',
        command=print_selection
    )
rC = tk.Radiobutton(
        window,
        text='Option C',
        variable=var, value='C',
        command=print_selection
    )

lbl.pack()
rA.pack()
rB.pack()
rC.pack()

window.mainloop()

Useful links

• Learn Tkinter: https://pythonbasics.org/tkinter/
• Wikipedia tkinter: https://en.wikipedia.org/wiki/Tkinter