Python

Question

我试图制作一个简单的扫雷板，但是当我执行以下代码时：

import random
import tkinter as tk
import numpy as np

WIDTH = 4
HEIGHT = 4

class Board:
def __init__(self, width, height):
    self.width = width
    self.height = height
    number_of_mines = (width-1)*(height-1)
    self.number_of_mines = number_of_mines
    """# added 'padding' to avoid IndexOutOfRange errors, so iterate statring at index 1 and iterate to index whatever-1"""
    board = np.array([[0 for i in range(width+2)] for j in range(height+2)], dtype = str)
    self.board = board
    for i in range(number_of_mines):
        # generate random co-ords for bombs
        while True:
            x_pos, y_pos = random.randint(1, width), random.randint(1,height)
            if board[y_pos, x_pos] != 'b':
                board[y_pos, x_pos] = 'b'
                break

    # iterate over each square of the board
    for y_pos in range(1, height):
        for x_pos in range(1, width):
            # if the square in question is a bomb then skip it
            if board[y_pos, x_pos] == 'b':
                continue
            adj_squares = board[(y_pos-1):3, (x_pos-1):3]
            count = 0
            for square in np.nditer(adj_squares):
                if square == 'b':
                    count+=1
            board[y_pos, x_pos]=str(count)


test = Board(WIDTH, HEIGHT)
print(test.board)

我得到这样的输出：

[['0' '0' '0' '0' '0' '0']
['0' 'b' 'b' 'b' 'b' '0']
['0' '2' '2' 'b' '0' '0']
['0' 'b' '0' '0' '0' '0']
['0' '0' 'b' 'b' 'b' '0']
['0' '0' '0' '0' '0' '0']]

比 4x4 板更大会破坏我的代码并给我一个 ValueError。

任何帮助将不胜感激:)

Answer 1

我发现您的代码存在多个问题。

首先，您不更新 self.board，而是更新 board，这意味着您的最终结果不会 return 除了“0”和 [=29] 之外的任何数字=].

你也不更新第一行的数字，我想是为了防止索引错误？我会将您的范围从 1 开始更改为 0 开始。

我已将此行代码更改如下以处理错误的索引：

adj_squares = board[(y_pos-1):3, (x_pos-1):3]

到这一行：

adj_squares = self.board[max((y_pos-1),0):min(height, y_pos + 2), max((x_pos-1),0):min(width, x_pos + 2)]

这可以防止数组在不存在的坐标中建立索引（在您的代码中，当您检查最后一列时它会出错）。

这使得最终结果：

import random
import numpy as np

WIDTH = 5
HEIGHT = 5

class Board:
    def __init__(self, width, height):
        self.width = width
        self.height = height
        number_of_mines = (width-1)*(height-1)
        self.number_of_mines = number_of_mines
        """# added 'padding' to avoid IndexOutOfRange errors, so iterate statring at index 1 and iterate to index whatever-1"""
        board = np.array([[0 for i in range(width+2)] for j in range(height+2)], dtype = str)
        self.board = board
        for i in range(number_of_mines):
            # generate random co-ords for bombs
            while True:
                x_pos, y_pos = random.randint(1, width), random.randint(1,height)
                if self.board[y_pos, x_pos] != 'b':
                    self.board[y_pos, x_pos] = 'b'
                    break

        # iterate over each square of the board
    for y_pos in range(0, height + 2):
        for x_pos in range(0, width + 2):
            # if the square in question is a bomb then skip it
            if self.board[y_pos, x_pos] == 'b':
                continue
            adj_squares = self.board[max((y_pos-1),0):min(height + 2, y_pos + 2), max((x_pos-1),0):min(width + 2, x_pos + 2)]                    print(adj_squares)
                count = 0
                for square in np.nditer(adj_squares):
                    if square == 'b':
                        count+=1
                print(count)

                self.board[y_pos, x_pos]=str(count)


test = Board(WIDTH, HEIGHT)
print(test.board)

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