Tic-Tac-Toeエラー処理Python

Question

私はTic-Tac-Toeのゲームをほぼ完了しました。ただし、ユーザーが33を超える数値を入力すると、次のエラーが表示されます。

 while board[choice] != " ": 
"IndexError: list index out of range" 

マイリストは0-33からのものです。誤って50を入力すると、このエラーを防ぐ方法がわかりません。あなたが入力したユーザに尋ねるライン41の後にこれを追加すること

TY

#Defining the board (The board is initally an empty list, which evenutally holds the user's data/input. 
#The desired user input of a x(column) and y(row) coordinate "1,2,3 by 1,2,3" is held by the associated list value point. 
#For example, "board[31] will hold either "X" or "O" when the user enters "31" (column 3, row 1) 
board = ["", "", "", "", "", "", "", "", "", "", "", " ", " ", " ", "", "", "", "", "", "", "", " ", " ", " ", "", "", "", "", "", "", "", " ", " ", " "] 

#Defining the print_board function. This produces/prints the actual board in real-time for the console when needed. (When a user chooses an available block) 
def print_board(): 
    print (' 1  2 3 ') 
    print ('  | | ') 
    print ('1 '+board[11]+" | "+board[21]+" | "+board[31]+"") 
    print (' ----+----+----') 
    print ('  | | ') 
    print ('2 '+board[12]+" | "+board[22]+" | "+board[32]+"") 
    print ('  | | ') 
    print (' ----+----+----') 
    print ('  | | ') 
    print ('3 '+board[13]+" | "+board[23]+" | "+board[33]+"") 
    print ('  | | ') 

#Welcome message and instructions. 
print("Welcome to Tic-Tac-Toe\n-----------------------\n")  
print("Please enter a column followed by a row, e.g, 22 equates to the middle box.") 
print(" 1 2 3 ") 
print("1 |  | ") 
print("-----+-----+----") 
print("2 | x | ") 
print("-----+-----+----") 
print("3 |  | ") 
print("-----|-----|----\n\n") 



#while True statement to start the game. 
while True: 
    print_board() 
    #Firstly print the board 

    #Player "X" 
    #Player "X" input 
    while True: 
     try: 
      choice = int(input("Please choose an empty space for X. (column,row) ")) 
      break 
     except ValueError: 
      print ("Error, Please enter a coordinate.") 

     else: 
      break 


    #While loop, in case location is already taken. 
    while board[choice] != " ": 
      choice = int(input("Please choose an empty space for X. (column,row) ")) 
    if board[choice] == " ": 
     board[choice] = "X" 


    #Possible combinations for "X" to win.  
    if board[11] == "X" and board[21] =="X" and board[31] == "X" or \ 
     board[12] == "X" and board[22] =="X" and board[32] == "X" or \ 
     board[13] == "X" and board[23] =="X" and board[33] == "X" or \ 
     board[11] == "X" and board[12] =="X" and board[13] == "X" or \ 
     board[21] == "X" and board[22] =="X" and board[23] == "X" or \ 
     board[31] == "X" and board[32] =="X" and board[33] == "X" or \ 
     board[11] == "X" and board[22] =="X" and board[33] == "X" or \ 
     board[31] == "X" and board[22] =="X" and board[13] == "X": 
     print_board() 
     print ("X wins! Congratulations") 
     break 
    #Displays the last move. 
    print_board() 

    # True statement to identify a tie. If all locations are occupied then the game will result in a tie. 
    # isFull = True, is assuming the board is already full and a empty space " " will DISPROVE the True statement. 
    isFull = True 
    if " " in board: 
     isFull = False 

    if isFull == True: 
     print ("Tie") 
     break 


    #Player "O" 
    #Player "O" input 
    while True: 
     try: 
      choice = int(input("Please choose an empty space for O. (column,row) ")) 
      break 
     except ValueError: 
      print ("Error") 

     else: 
      break 


    #While loop, in case location is already taken. 
    while board[choice] != " ": 
      choice = int(input("Please choose an empty space for O. (column,row) ")) 
    if board[choice] == " ": 
     board[choice] = "O" 


    #Possible combinations for "O" to win. 
    if board[11] == "O" and board[21] =="O" and board[31] == "O" or \ 
     board[12] == "O" and board[22] =="O" and board[32] == "O" or \ 
     board[13] == "O" and board[23] =="O" and board[33] == "O" or \ 
     board[11] == "O" and board[12] =="O" and board[13] == "O" or \ 
     board[21] == "O" and board[22] =="O" and board[23] == "O" or \ 
     board[31] == "O" and board[32] =="O" and board[33] == "O" or \ 
     board[11] == "O" and board[22] =="O" and board[33] == "O" or \ 
     board[31] == "O" and board[22] =="O" and board[13] == "O": 
     print_board() 
     print ("O wins! Congratulations") 
     break 

    # True statement to identify a tie. If all locations are occupied then the game will result in a tie. 
    # isFull = True, is assuming the board is already full and a empty space " " will DISPROVE the True statement. 
    isFull = True 
    if " " in board: 
     isFull = False 

    if isFull == True: 
     print ("Tie") 
     break 

Answer 1

試してみてください。

while choice > 33 or choice < 0: 
    print('Invalid input. Try again.') 
    choice = int(input()) 

もしそうなら、入力は、0〜33の範囲外にあると場合はチェックユーザに再度入力を要求する。