在Python中，为什么我的DeepCopy仍然具有其值的变化？

Question

我在 python 中创建了一个类，并且尝试创建它的 deepCopy，但是当我修改原始类时，“deepCopy”的值仍然发生了变化。

class boardState():
    def __init__(self, board, orient,actions,expl):
        self.board
        self.orientations = orient
        self.actions = actions
        self.explored = expl    
    def __deepcopy__(self):
        return boardState(self.board, self.orientations, self.actions, self.explored)

    board = []
    orientations = {}           #this stores the orientations of the cars in the current problem.
    actions = []                #this is a list of the moves made to get to this current position.
    explored = [] 

^ 上面是我正在使用并想要复制的类。

 referencestate = copy.deepcopy(state)         
            
 print(id(referencestate))                                   
 print(id(state))  

^ 运行此行后，显示它们具有相同的 id，我想让它们独立。

任何帮助将不胜感激！

Answer 1

我认为这个deepcopy只是得到了一个新的boardState类，但是id(state.board) = id(referencestate.board)，因为在创建class时直接使用原始对象。
如果不想更改原始值，请不要直接传递参数。使用它们的副本。你可以尝试使用 ->state=boardState(board[:], dict.copy(orientations), actions[:],explored[:]) #this 使用shallow。
看看下面的代码->

import copy
class boardState():
    def __init__(self, board, orient,actions,expl):
        self.board = board
        self.orientations = orient
        self.actions = actions
        self.explored = expl
        
    """
    def __deepcopy__(self, memo):
        return boardState(self.board[:], dict.copy(self.orientations), self.actions[:], self.explored[:])
    
    def __deepcopy__(self):
        return boardState(self.board, self.orientations, self.actions, self.explored)
    """
    def __deepcopy__(self, memo):
        dpcpy = self.__class__
        memo[id(self)] = dpcpy
        for attr in dir(self):
            if not attr.startswith('_'):
                value = getattr(self, attr)
                setattr(dpcpy, attr, copy.deepcopy(value, memo))
        return dpcpy


board = [[1]]
orientations = {"6":"h"}           #this stores the orientations of the cars in the current problem.
actions = [2]                #this is a list of the moves made to get to this current position.
explored = [3] 
state1=boardState(board, orientations, actions,     explored)
state2=boardState(board[:], dict.copy(orientations), actions[:],    explored[:])
referencestate = copy.deepcopy(state1)
print(id(referencestate))
print(id(state1))
print(id(state2))
print(id(state1.board))
print(id(state2.board))
print(id(state1.board) == id(state2.board))
print(id(referencestate.board))
print(id(state1.board) == id(referencestate.board))
print(id(state1.board[0]))
print(id(state2.board[0]))
print(id(state1.board[0]) == id(state2.board[0]))
print(id(referencestate.board[0]))
print(id(state1.board[0]) == id(referencestate.board[0]))

尝试跑步