python - 对象的描述符不适用于对象，使用 __slots__

Question

早上好

我在尝试在我的一门类(class)中使用 __ 插槽 __ 时遇到问题。我想用它来优化 Classifier 对象的多个实例的创建。我正在使用 Python 3.7.1。

这行得通

class Classifier() :

    def __init__(self, own_storage, partner_storage, decision, strength) :

        self.own_storage = own_storage
        self.partner_storage = partner_storage
        self.decision = decision
        self.strength = strength

这行不通

class Classifier() :

    __slots__ = ('own_storage', 'partner_storage', 'decision', 'strength')

    def __init__(self, own_storage, partner_storage, decision, strength) :

        self.own_storage = own_storage
        self.partner_storage = partner_storage
        self.decision = decision
        self.strength = strength

这里是我创建 Classifier 的所有实例的地方(它是另一个类的方法)

def allClassifiers(self) :

        cs = []
        own_range = []
        partner_range = []

        for i in range(1, self.agent.model.n_types + 1) :

            own_range.append(i)
            own_range.append(-i)
            partner_range.append(i)
            partner_range.append(-i)


        for own in own_range :

            for partner in partner_range :

                for decision in [0, 1] :

                    cs.append(Classifier(own, partner, decision, i))

        return cs  

我遇到的错误:

Traceback (most recent call last):

  File "C:\Users\Diru\Desktop\Internship\Sketch\classes\test.py", line 53, in <module>
    m = Model(10000, 1, 1, init_distribution = [0, 1, 1, 0], state_t = "uniform")

  File "C:\Users\Diru\Desktop\Internship\Sketch\classes\model.py", line 53, in __init__
    a = Agent(id_, i, self, production_i, h)

  File "C:\Users\Diru\Desktop\Internship\Sketch\classes\agent.py", line 31, in __init__
    self.cs = ClassifierSystem(self)

  File "C:\Users\Diru\Desktop\Internship\Sketch\classes\classifier_system.py", line 17, in __init__
    self.classifiers = self.allClassifiers()

  File "C:\Users\Diru\Desktop\Internship\Sketch\classes\classifier_system.py", line 41, in allClassifiers
    cs.append(Classifier(own, partner, decision, i))

  File "C:\Users\Diru\Desktop\Internship\Sketch\classes\classifier.py", line 7, in __init__
    self.own_storage = own_storage

TypeError: descriptor 'own_storage' for 'Classifier' objects doesn't apply to 'Classifier' object

我看过多个关于如何使用 __ 插槽 __ 的示例，但我无法理解我在哪里犯了错误。感谢您的帮助。

编辑:如果我尝试这段代码，它会起作用

class Classifier() :

    __slots__ = ('own_storage', 'partner_storage', 'decision', 'strength')

    def __init__(self, own_storage, partner_storage, decision, strength) :

        self.own_storage = own_storage
        self.partner_storage = partner_storage
        self.decision = decision
        self.strength = strength

    c = []
    for i in range(0, 70) :      
        c.append(Classifier(1, 2, 1, i))

此外，如果我将此代码的最后 3 行放入 allClassifiers 函数(我在问题中输入的代码的第三部分)，它会起作用。

编辑 2:我对 Spyder 的工作方式有些不理解。从 shell 运行程序，它在任何情况下都能完美运行。使用 Spyder，在删除之前运行的变量后，现在插槽版本可以使用，没有它的版本会给我这个错误:

Traceback (most recent call last):

  File "C:\Users\Diru\Desktop\Internship\Sketch\classes\test.py", line 53, in <module>
    m = Model(10000, 1, 1, init_distribution = [0, 1, 1, 0], state_t = "uniform")

  File "C:\Users\Diru\Desktop\Internship\Sketch\classes\model.py", line 53, in __init__
    a = Agent(id_, i, self, production_i, h)

  File "C:\Users\Diru\Desktop\Internship\Sketch\classes\agent.py", line 31, in __init__
    self.cs = ClassifierSystem(self)

  File "C:\Users\Diru\Desktop\Internship\Sketch\classes\classifier_system.py", line 17, in __init__
    self.classifiers = self.allClassifiers()

  File "C:\Users\Diru\Desktop\Internship\Sketch\classes\classifier_system.py", line 41, in allClassifiers
    cs.append(Classifier(own, partner, decision, i))

  File "C:\Users\Diru\Desktop\Internship\Sketch\classes\classifier.py", line 7, in __init__
    self.own_storage = own_storage

AttributeError: 'Classifier' object has no attribute 'own_storage'

至少现在我知道问题是我不知道如何使用Spyder

Answer 1

我遇到了同样的问题。
解决方案:重启 Spyder。
希望它能解决问题。