创建一个GUI窗口

import tkinter as tk
window = tk.Tk()
# 设置窗口标题
window.title('my window')
window.geometry('400x300')
# tk中的字符串变量
var = tk.StringVar()
var.set('FALSE')
on_hit = False
# 设置一个 label
# l = tk.Label(window, text='OMG! this is Tk!', bg='#ccc', font=('Arial', 12), width=15, height=10)
l = tk.Label(window, textvariable=var, bg='#ccc',  width=15, height=10)
# 设置位置上下左右
l.pack()
def hit_me():
    global on_hit
    if on_hit is False:
        on_hit = True
        var.set('TRUE')
    else:
        on_hit = False
        var.set('FALSE')
b = tk.Button(window, text='hit', width=15, height=2, command=hit_me)
b.pack()
# 显示出来，其实自身是一个循环，否则只有一帧
window.mainloop()