How to modify a list (2D Array) using user input? (Python)

Question

I am trying to make a basic tic-tac-toe game, so I need the user to input which part of the grid they would like to change into an "X" or "O" (required to use lists). The grid can be accessed using the syntax board[row][column].

board = [["1", "2", "3"],
    ["4", "X", "6"],
    ["7", "8", "9"]]

def EnterMove(board):
    player_move = input("Using board[row][column] syntax, make your move: ")
    if player_move in board:      # program doesn't recognize the input here
            board[player_move] = "O"

board is nested list so this if player_move in board will never work — deadshot
– deadshot, Commented Sep 13, 2020 at 7:37
Does this answer your question? How to check if an element is in a nested list? — deadshot
– deadshot, Commented Sep 13, 2020 at 7:39

Vaclav · Accepted Answer · 2020-09-13 07:47:48Z

0

I don't think is the best practice, but

for row in board:
        if player_move in row:      
                row[row.index(player_move)] = "O"

answered Sep 13, 2020 at 7:47

Vaclav

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