如何在python中的2D数组中查找值？

我正在为学校制作一个棋盘游戏，我希望能够找到他们拥有的牌号索引，并用他们的计数器（“x”或“y”）替换棋盘上的数字

我如何在黑板上找到“place1”或“place2”的字符串版本，并用其他索引替换该索引

谢谢大家!

ind=np。其中（np.array（board）==str（place1））

将返回

board

数组中等于

place

的所有元素的索引。要替换这些值，请执行以下操作：

board[ind]=newval

基本上

import numpy as np
ind = np.where(np.array(board) == str(place1))
board[ind] = newval

---

您需要迭代主列表，然后可以使用

list.index（）

查找子列表索引，例如：

def index_2d(data, search):
    for i, e in enumerate(data):
        try:
            return i, e.index(search)
        except ValueError:
            pass
    raise ValueError("{!r} is not in list".format(search))

对于2D数组，它的作用与list.index（）完全相同，因此：

position = index_2d(board, "18")  # (4, 3)
print(board[position[0]][position[1]])  # 18

position = index_2d(board, "181")  # ValueError: '181' is not in list

---

我在下面加了一行。数组接受整数值，但不接受元组/列表。下面是上面@zwer给出的代码片段中的一行。感谢@zwer

board[position[0]][position[1]] = 'Replaced'



def index_2d(data, search):
    for i, e in enumerate(data):
        try:
            return i, e.index(search)
        except ValueError:
            pass
    raise ValueError("{} is not in list".format(repr(search)))


board = [
    ["43","44","45","46","47","48","49"],
    ["42","41","40","39","38","37","36"],
    ["29","30","31","32","33","34","35"],
    ["28","27","26","25","24","23","22"],
    ["15","16","17","18","19","20","21"],
    ["14","13","12","11","10","9 ","8 "],
    ["1 ","2 ","3 ","4 ","5 ","6 ","7 "]

    ]

position = index_2d(board, "21")
board[position[0]][position[1]] = 'Replaced'
print("{}".format(board))

输出将是这样的，请注意其中的“替换”

---

Python列表有一个

索引（值）

方法

board[position[0]][position[1]] = 'Replaced'



def index_2d(data, search):
    for i, e in enumerate(data):
        try:
            return i, e.index(search)
        except ValueError:
            pass
    raise ValueError("{} is not in list".format(repr(search)))


board = [
    ["43","44","45","46","47","48","49"],
    ["42","41","40","39","38","37","36"],
    ["29","30","31","32","33","34","35"],
    ["28","27","26","25","24","23","22"],
    ["15","16","17","18","19","20","21"],
    ["14","13","12","11","10","9 ","8 "],
    ["1 ","2 ","3 ","4 ","5 ","6 ","7 "]

    ]

position = index_2d(board, "21")
board[position[0]][position[1]] = 'Replaced'
print("{}".format(board))

[
['43', '44', '45', '46', '47', '48', '49'], 
['42', '41', '40', '39', '38', '37', '36'], 
['29', '30', '31', '32', '33', '34', '35'], 
['28', '27', '26', '25', '24', '23', '22'], 
['15', '16', '17', '18', '19', '20', 'Replaced'], 
['14', '13', '12', '11', '10', '9 ', '8 '], 
['1 ', '2 ', '3 ', '4 ', '5 ', '6 ', '7 ']
]