不明原因類型錯誤的列表

Question

def player_move(Player, board): 
    playerMarker = None 
    print("Player ",Player," it is your turn!") 
    playerChoice = input("Please input your move: ") 
    if Player == 1: 
     playerMarker == 9 
    else: 
     playerMarker == 10 
    board[playerChoice] == playerMarker 

這會產生類型錯誤：

line 36, in player_move 
board[playerChoice] == playerMarker 
TypeError: list indices must be integers or slices, not str 

這是爲什麼，我怎麼能阻止這種從occouring？我明白str不能添加到這個列表中，但是我不是試圖添加整數嗎？

Answer 1

存在兩個問題：您假定playerChoice是一個整數（它是一個字符串，必須使用int()。*進行轉換），並且您正在使用==進行分配。這裏是它的固定：

def player_move(Player, board): 
    playerMarker = None 
    print("Player ",Player," it is your turn!") 
    # should probably check for invalid inputs here 
    playerChoice = int(input("Please input your move: ")) 
    if Player == 1: 
     playerMarker = 9 
    else: 
     playerMarker = 10 
    board[playerChoice] = playerMarker 

*您可能會搞不清楚是否來自Python 2中，其中input確實（偶爾）返回一個整數。 Python 3的input≙Python 2的raw_input。