python之tkinter之button

代码：
from tkinter import *
import random

root = Tk()
color = [“white”, “black”]
for j in range(0, 20):
for i in range(0, 20):
r = random.randrange(0, 2)
action = Button(root, bg=color[r], width=3)
action.grid(row=j, column=i)
root.mainloop()

运行截图：