我的 python 图形代码有什么问题？

Question

我正在尝试制作一个 9x9 的文本框网格。 我在网格函数的"输入"部分不断收到错误。请帮忙，对于由于代码不能按照我想要的方式而陷入的不幸情况，我感到非常难过。

import Tkinter
from Tkinter import *
import tkMessageBox
def window():
    main_window = Tkinter.Tk()
    main_window.geometry("500x500")      
    main_window.wm_title("Sudoku Solver 2000gazillion")
    main_window.mainloop()
def grid():
    knownNumbers = [
        [0,0,0,0,0,0,0,0,0],
        [0,0,0,0,0,0,0,0,0],
        [0,0,0,0,0,0,0,0,0],
        [0,0,0,0,0,0,0,0,0],
        [0,0,0,0,0,0,0,0,0],
        [0,0,0,0,0,0,0,0,0],
        [0,0,0,0,0,0,0,0,0],
        [0,0,0,0,0,0,0,0,0],
        [0,0,0,0,0,0,0,0,0]
        ]
    for row in range(0,9):
        for col in range(0,9):
            entry = Entry(main_window, textvariable = knownNumbers[row][col])
            entry[row][col].grid(row=row, column=col) 
def goButtonAction():
    tkMessageBox.showinfo("Horray!", 'Finished product goes here')
def goButton():
    button=Button(main_window, text = "Solve it!", command = goButtonAction )
    button.grid(row=10, column=0, columnspan = 9)
def main():
    window()
    grid()
    goButton()
main() #run it up

我收到以下错误：

Traceback (most recent call last):
  File "C:/Windows/System32/temp", line 40, in <module> main() #run it up
  File "C:/Windows/System32/temp", line 37, in main grid()
  File "C:/Windows/System32/temp", line 25, in grid entry = Entry(main_window, textvariable = knownNumbers[row][col])
NameError: global name 'main_window' is not defined

我正在使用Python 2.7

Answer 1

您正在window()函数中定义main_window变量。这会将此变量的使用限制为 window() 函数。如果您希望它在任何地方都可用，例如，您可以在window()函数之外定义它，例如

：

# Imports
main_window = Tkinter.tk()
def window():
    main_window.geometry("500x500")
# Rest of your code