帮我写一个华容道的程序，要求用python完成，尽量简洁并带注释

好的，感谢您的提问。以下是华容道程序的Python实现：

# 导入必要的模块
import random

# 初始化游戏板
board = [[1, 2, 3], [4, 5, 6], [7, 8, 0]]
size = 3

# 定义游戏操作函数
def move(direction):
    global board
    row, col = 0, 0
    # 找到空格所在位置
    for i in range(size):
        if 0 in board[i]:
            row, col = i, board[i].index(0)
            break
    # 根据方向移动数字块
    if direction == "up" and row > 0:
        board[row][col], board[row-1][col] = board[row-1][col], board[row][col]
    elif direction == "down" and row < size-1:
        board[row][col], board[row+1][col] = board[row+1][col], board[row][col]
    elif direction == "left" and col > 0:
        board[row][col], board[row][col-1] = board[row][col-1], board[row][col]
    elif direction == "right" and col < size-1:
        board[row][col], board[row][col+1] = board[row][col+1], board[row][col]

# 定义游戏结束判断函数
def is_game_over():
    global board
    for i in range(size):
        for j in range(size):
            if board[i][j] != i*size + j + 1:
                return False
    return True

# 开始游戏
print("华容道游戏开始啦！")
while not is_game_over():
    # 打印当前游戏板状态
    for i in range(size):
        for j in range(size):
            print(board[i][j], end="\t")
        print("\n")
    # 接收用户输入
    direction = input("请输入移动方向(up/down/left/right):")
    # 移动数字块
    move(direction)
    # 打乱游戏板
    random.shuffle(board)
# 游戏结束
print("恭喜你，游戏结束啦！")

如有任何疑问，请随时联系我。感谢支持！