提交用户输入时，Tkinter窗口冻结

Question

当我打开一个tkinter窗口供用户输入玩家名称时，玩家名称将成为包含玩家在游戏中得分的保存文件名，tkinter窗口会打开，只要点击提交按钮，游戏本质上是冻结的，我必须关闭游戏。我怎么阻止它冻结？这是代码：

print(str(redpoints))
print(str(yellowpoints))

master = Tk()
master.title('Save File Name')
v = StringVar()


# Variable to hold the input
inp = None

L1 = Label(master, text = 'Enter Player Names:')
L1.pack(side = LEFT)

E1 = Entry(master, textvariable = v, bd = 5)
E1.pack(side = RIGHT)

def userinput():
    # Declare 'inp' to be global
    global inp
    savename = input(v.get())
    print (savename)
    # Update the variable
    inp = savename


Submit = Button(master, text = 'Submit', command = userinput)
Submit.pack(side = BOTTOM)
print(inp)
master.mainloop()
answer = (str(redpoints), " ", str(yellowpoints))
example = open(inp + '.txt', 'w') #opening the file, 'w' allows to write in it.
example.write(answer)
example.close()
pygame.quit()
quit()

在用户输入= savename

之前崩溃