二维列表函数，我不知道如何打印输入，python

Question

my code is trying to set the point in the list they chose to an x, please assist in changing the code so that it works, here's the code:

position = input("x or y: ")
board = [
    [" ", " ", " "],
    [" ", " ", " "],
    [" ", " ", " "],
    [" "]
    ]
gamewon = False
game_start = "Enter \"s\" when ready to start game";







def game1(placement1, placement2):
    placement1 = input("row: ")
    placement2 = input("column: ")
    board[placement1][placement2] = "x"
    print(board)

Answer 1

 #Assign values to the parameters.
 placement1 = None
 placement2 = None
 board = [
[" ", " ", " "],
[" ", " ", " "],
[" ", " ", " "],
[" "]
]

 def game1(placement1, placement2, board): #Add board as a parameter
        placement1 = int(input("row: "))
        placement2 = int(input("column: ")) 
        board[placement1][placement2] = "x" #Input has to be an integer for this to work
        print(board)

#Call the function
game1(placement1, placement2, board)

This will change the index in the nested list to an x after user Input