问如果按钮在列表中，如何编辑按钮上的文本？

EN

from tkinter import *
import tkinter.messagebox
tk=Tk()
tk.title("Tic Tac Toe")

bclick = True

buttons =  [" "," "," "," "," "," "," "," "," ",]
button_list = [" "," "," "," "," "," "," "," "," ",]
def make_button(n, row, col):
    button_list[n] = Button(tk,text=" ",bg='gray',fg='white',height=4,width=8,command=lambda:ttt(buttons, n))
    button_list[n].grid(row=row,column=col, sticky=S+N+E+W)
    button_list[n] = n

a = 0
B = [0,0,0,1,1,1,2,2,2]
C = [0,1,2,0,1,2,0,1,2]
while a != 9:
    b=B[a]
    c=C[a]
    make_button(a, b, c)
    a+=1

def ttt(buttons, n):
     global bclick
     if buttons[n] == " " and bclick == True:
         buttons[n] = "X"
         button_list[n]["text"] = "X"
         bclick = False
     elif buttons[n] == " " and bclick == False:
          buttons[n] = "O"
          bclick = True