ValueError：数组的真值...来自dict键比较

Question

我不知道为什么会继续出现此错误：

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                                <div class="input-box">

                                    <textarea placeholder="Message"  name="message"></textarea>

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                            <div class="col-sm-12">

                                <div class="submit-box">

                                    <input type="submit" value="SEND" class="btn">
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                                </div>    
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                    </form>

                </div>

        if node not in self.children: return path    
    ValueError: The truth value of an array with more than one element is 
    ambiguous. Use a.any() or a.all()

def _select(self, node): "Find an unexplored descendent of `node`" path = [] while True: path.append(node) breakpoint() if node not in self.children: return path if node.is_terminal(): return path 是节点set（）的dict（）。节点显然是一个节点

尝试时在调试器中出现相同的错误

self.children

我想知道这是否与这些有关，但我不能告诉你：

    (Pdb) self.children[node]
    *** ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

self.children只有一把钥匙：

def __hash__(self):
    "Nodes must be hashable"
    return hash(tuple(self.board.flatten()))

def __eq__(node1, node2):
    "Nodes must be comparable"
    #if node1 is None: return True
    #if node2 is None: return True
    return node1.board == node2.board

和很多set（）值

    (Pdb) self.children.keys()

    turn:1
        |   |   |   |   |   |   |   |
        |   |   |   |   |   |   |   |
        |   |   |   |   |   |   |   |
        |   |   |   |   |   |   |   |
        |   |   |   |   |   |   |   |
        | O |   |   |   |   |   |   |
          _   _   _   _   _   _   _
          0   1   2   3   4   5   6
    dict_keys([
    turn: 1,last: (5, 0), done False, winner: None])

但是此代码可以正常工作：

    Pdb) self.children
    {
    turn: 1,last: (5, 0), done False, winner: None: {
    turn: 2,last: (5, 2), done False, winner: None,
    turn: 2,last: (5, 3), done False, winner: None,
    turn: 2,last: (5, 6), done False, winner: None,
    turn: 2,last: (5, 1), done False, winner: None,
    turn: 2,last: (4, 0), done False, winner: None,
    turn: 2,last: (5, 4), done False, winner: None,
    turn: 2,last: (5, 5), done False, winner: None}}

我为什么不能写 from random import randint children = dict() # children of each node j = set() for i in range(10): j = (randint(0,5) for _ in range(5)) children[i] = j print(12 not in children) output: true 的任何想法？