为什么将值设为 "None" 而不是 "LIVE"？

Question

这是生命游戏程序。当我测试它时，即使配置文件指示将制作 8 个正方形，我的 surrounding(row,col) 函数返回 0 "LIVE." 只是运行打开配置文件后通过打印板进行测试，事实证明，不是让指示的方块说 'LIVE,'，而是 'LIVE' 的方块说 'None'，所以没有计算 'LIVE' 值。

[[None, None, None, 0, 0, 0, 0], [None, 0, None, 0 , 0, 0, 0], [None, None, None, 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]]是我 print board 时得到的。看不到我在这里遗漏了什么？

LIVE = 1
DEAD = 0

def board(canvas, width, height, n):
    for row in range(n+1):
        for col in range(n+1):
            canvas.create_rectangle(row*height/n,col*width/n,(row+1)*height/n,(col+1)*width/n,width=1,fill='black',outline='green')                      

n = int(raw_input("Enter the dimensions of the board: "))
width = n*25
height = n*25

from Tkinter import *
import math

window=Tk()
window.title('Game of Life')

canvas=Canvas(window,width=width,height=height,highlightthickness=0)
canvas.grid(row=0,column=0,columnspan=5)

board = [[DEAD for row in range(n)] for col in range(n)]

rect = [[None for row in range(n)] for col in range(n)]


for row in range(n):
    for col in range(n):      
        rect[row][col] = canvas.create_rectangle(row*height/n,col*width/n,(row+1)*height/n,(col+1)*width/n,width=1,fill='black',outline='green') 

#canvas.itemconfigure(rect[2][3], fill='red') #rect[2][3] is rectangle ID

#print rect

f = open('filename','r') #filename is whatever configuration file is chosen that gives the step() function to work off of for the first time
for line in f:
    parsed = line.split()
    print parsed
    if len(parsed)>1:
        row = int(parsed[0].strip())
        col = int(parsed[1].strip())
        board[row][col] = LIVE
        board[row][col] = canvas.itemconfigure(rlist[row][col], fill='red')        

def surrounding(row,col):
    count = 0
    if board[(row-1) % n][(col-1) % n] == LIVE:
        count += 1
    if board[(row-1) % n][col % n] == LIVE:
        count += 1
    if board[(row-1) % n][(col+1) % n] == LIVE:
        count += 1
    if board[row % n][(col-1) % n] == LIVE:
        count += 1
    if board[row % n][(col+1) % n] == LIVE:
        count += 1
    if board[(row+1) % n][(col-1) % n] == LIVE:
        count +=1
    if board[(row+1) % n ][col % n] == LIVE:
        count += 1
    if board[(row+1) % n][(col+1) % n] == LIVE:
        count += 1
    print count
    return count

surrounding(1,1)

Answer 1

您正在为 board 嵌套列表的项目分配两次：

    board[row][col] = LIVE
    board[row][col] = canvas.itemconfigure(rlist[row][col], fill='red')

第一个将 1 分配给适当的值，第二个将 1 替换为 None，因为这是 canvas.itemconfigure 的 return 值用这些参数调用。我怀疑（无需测试）您应该简单地从第二个语句中删除赋值：

    board[row][col] = LIVE
    canvas.itemconfigure(rlist[row][col], fill='red')

这可能仍然存在问题（例如 rlist 需要 rect，也许？），但是 None 值的问题应该得到解决。

为什么将值设为 "None" 而不是 "LIVE"？

Why are the values being made into "None" instead of "LIVE"?

python

tkinter