[英]How to check specific elements of a list for a string value?
所以即時編碼Tic Tac Toe
我已經將環境創建為9個元素的列表,如下所示 -
board=[' ']*9
然后我將X或O放在板上
board[move-1] = 'X'
哪個工作正常
我遇到的問題是在放置X或O之后,我無法檢查獲勝條件。 輸出始終返回false, 檢查輸出
if (board[0] and board[1] and board[2] == 'X') or (board[0] and board[1] and board[2] == 'O') :
return winner==1
在上面的代碼中,即使索引0,1和2是X,它也會將獲勝者返回為false。
我認為這是一個簡單的字符串處理問題,但我不太確定。 任何幫助,將不勝感激。
嘗試使用的if語句如下: all
將是True
,如果所有的3個元素board
或者是X
。 這同樣適用於O
if all(board[i]=='X' for i in range(3)) or all(board[i]=='O' for i in range(3)):
return winner==1
要覆蓋垂直,水平和對角線,您可以為每個方向建立軸位置列表,並檢查它們中的任何一個是否映射到XXX或OOO:
axes = [(0,1,2),(3,4,5),(6,7,8),(0,3,6),(1,4,7),(2,5,8),(0,4,8),(2,4,6)]
win = any(board[a]+board[b]+board[c] in ["XXX","OOO"] for a,b,c in axes)
如果您想讓計算機玩游戲,您可以創建一個移動評級功能,分析每個可玩位置並返回與位置有多好的數字。
這是一個例子:
from random import sample
axes = [(0,1,2),(3,4,5),(6,7,8),(0,3,6),(1,4,7),(2,5,8),(0,4,8),(2,4,6)]
def isWin(board):
return any(board[a]+board[b]+board[c] in ["XXX","OOO"] for a,b,c in axes)
def rating(position,play,board,level=3**6): # 3**6=Invincible, 3**4=hard, 3**1=Easy
if board[position] != " " or level < 3: return 0
newBoard = board[:position]+[play]+board[position+1:]
if isWin(newBoard): return level*2
nextRatings = [rating(p,"XO"[play=="X"],newBoard,level/3) for p in range(9)]
return level-max(nextRatings,key=abs)
while True:
board = [" "]*9
player,computer = sample("XOXO",2)
while True:
for r in range(0,9,3):
print("("+") (".join(board[r:r+3])+")",list(range(r+1,r+4)))
available = [str(p+1) for p in range(9) if board[p] == " "]
if isWin(board) or not available : break
player = "XO"[player=="X"]
if player == computer:
position = max(sample(range(9),9),key=lambda p:rating(p,computer,board))
print(f"Computer plays {player} at {position+1}")
else:
while True:
position = input(f"Position to play for {player}: ")
if position not in available: print("Invalid position")
else : position = int(position)-1; break
board[position] = player
print( f"{player}'s WIN !!!\n" if isWin(board) else "DRAW.\n")
rating()
函數通過可能的移動遞歸地返回一個值,該值基於到達游戲結束所需的移動次數而變得越來越小。 每個級別的值都會根據哪個玩家的回合加或減
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