如何解决使用元组和浮点数的Minimax算法时发生TypeError
我目前正在一个项目中,我需要实现一个Minimax算法来创建井字游戏。在某些时候,我正在比较元组和浮点数,虽然我知道这实际上是行不通的,但我不知道该问题来自何处或如何解决。如果有人可以帮助我理解,那将是惊人的。谢谢!
这是我的代码
import copy
X = "X"
O = "O"
EMPTY = None
def initial_state():
"""
Returns starting state of the board.
"""
return [[EMPTY,EMPTY,EMPTY],[EMPTY,EMPTY]]
def player(board):
Xboard_count = board[0].count(X) + board[1].count(X) + board[2].count(X)
if Xboard_count % 2 == 1:
return 0
else:
return X
def actions(board):
"""
Returns set of all possible actions (i,j) available on the board.
"""
move = []
for i in range(3):
for j in range(3):
if board[i][j] == EMPTY:
move.append((i,j))
return move
def result(board,move):
"""
Returns the board that results from making move (i,j) on the board.
"""
if move not in actions(board):
raise Exception("this action is not a valid action")
dcopb = copy.deepcopy(board)
dcopb[move[0]][move[1]] = player(board)
return dcopb
def winner(board):
"""
Returns the winner of the game,if there is one.
"""
for x in range(3):
if board[x][0] == board[x][1] == board[x][2] != EMPTY:
return board[x][0]
for y in range(3):
if board[0][y] == board[1][y] == board[2][y] != EMPTY:
return board[0][y]
if board[0][0] == board[1][1] == board[2][2] != EMPTY:
return board[0][0]
if board[2][0] == board[1][1] == board[0][2] != EMPTY:
return board[2][0]
else:
return None
def terminal(board):
"""
Returns True if game is over,False otherwise.
"""
if winner(board) == X:
return True
elif winner(board) == O:
return True
for x in range(3):
for y in range(3):
if board[x][y] is None:
return False
return True
('si winner est égal à X :\n'
' return True\n'
' si winner est égal à 0\n'
' return true \n'
' \n'
' si le nombre de cases vides == 0\n'
' return true\n'
' else:\n'
' return false')
def utility(board):
"""
Returns 1 if X has won the game,-1 if O has won,0 otherwise.
"""
if winner(board) == X:
return 1
if winner(board) == 0:
return -1
else:
return 0
def minimax(board):
"""
Returns the optimal action for the current player on the board.
"""
if terminal(board):
return None
if player(board) == X:
v = v = float('-inf')
for move in actions(board):
temp = MinValue(result(board,move))
if temp > v:
v = temp
best = move
else:
v = float('inf')
for move in actions(board):
temp = MaxValue(result(board,move))
if temp < v:
v = temp
best = move
return best
def MaxValue(board):
if terminal(board):
return utility(board),None
v = float('-inf')
for move in actions(board):
v = max(v,MinValue(result(board,move)))
return
def MinValue(board):
if terminal(board):
return utility(board),None
v = float('inf')
for move in actions(board):
v = min(v,MaxValue(result(board,move)))
return v
我收到此确切的错误消息
TypeError:“ tuple”和“ float”的实例之间不支持“>”
解决方法
您将在return utility(board),None
中的MinValue
返回一个元组。因此,当您在temp = MinValue(result(board,move))
处调用函数时,如果调用了return语句,则temp
是一个元组
v
是浮点数。现在,当您尝试将其与temp
处的if temp < v:
进行比较时,您正在将浮点数与元组进行比较
首先,MinValue和MaxValue函数存在问题,它们有时返回两个值而不是一个。
然后,存在相同的TypeError,这一次在将NoneType变量与浮点数进行比较时出现问题。原来只有一个小错误,因为我的MaxValue函数未返回任何内容。
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