[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fsXehoOv3YvFj9yENpy1RkeiIzy4RYnQF9b-2G9LLkpw":3,"$fJU-4tot_gC5fDkujNeoE-cGsdMy5V_KcdUXLuAnTFgw":16,"$f8RLMZ5o0XMU60RPFyihmeHjahhvvfwr2ueQ1toDds7g":423},{"slug":4,"title":5,"description":6,"content":7,"content_html":8,"pub_date":9,"tags":10,"draft":15},"python-oop-guide","Python 面向对象：__init__ 之外你需要知道的","Python OOP 不只是 class + __init__，魔术方法、描述符、元类才是真正的武器。","# Python 面向对象：__init__ 之外你需要知道的\n\nPython OOP 不只是 `class + __init__`，魔术方法、描述符、元类才是真正的武器。这篇从基础到进阶，系统梳理 Python OOP 的全貌。\n\n---\n\n## 类的基础：五个必知魔术方法\n\n```python\nclass Vector:\n    def __init__(self, x: float, y: float):\n        self.x = x\n        self.y = y\n\n    def __repr__(self) -> str:\n        # 开发者用，调试时显示，eval() 可还原\n        return f\"Vector({self.x!r}, {self.y!r})\"\n\n    def __str__(self) -> str:\n        # 用户友好，print() 时调用；未定义则退化到 __repr__\n        return f\"({self.x}, {self.y})\"\n\n    def __eq__(self, other) -> bool:\n        # 定义 == 的行为\n        if not isinstance(other, Vector):\n            return NotImplemented\n        return self.x == other.x and self.y == other.y\n\n    def __hash__(self) -> int:\n        # 定义 hash()，使对象可作 dict key\u002Fset 元素\n        # 注意：定义了 __eq__ 后必须显式定义 __hash__，否则不可哈希\n        return hash((self.x, self.y))\n\nv1 = Vector(1, 2)\nv2 = Vector(1, 2)\nprint(repr(v1))   # Vector(1, 2)\nprint(str(v1))    # (1, 2)\nprint(v1 == v2)   # True\nd = {v1: \"origin\"}  # 可以，因为有 __hash__\n```\n\n---\n\n## 继承与 MRO\n\n### 单继承\n```python\nclass Animal:\n    def __init__(self, name: str):\n        self.name = name\n\n    def speak(self) -> str:\n        raise NotImplementedError\n\nclass Dog(Animal):\n    def speak(self) -> str:\n        return f\"{self.name} says Woof!\"\n\nclass Cat(Animal):\n    def speak(self) -> str:\n        return f\"{self.name} says Meow!\"\n```\n\n### 多继承与 MRO（C3 线性化）\n```python\nclass A:\n    def greet(self): return \"A\"\n\nclass B(A):\n    def greet(self): return \"B -> \" + super().greet()\n\nclass C(A):\n    def greet(self): return \"C -> \" + super().greet()\n\nclass D(B, C):\n    def greet(self): return \"D -> \" + super().greet()\n\nprint(D().greet())   # D -> B -> C -> A\nprint(D.__mro__)\n# (\u003Cclass D>, \u003Cclass B>, \u003Cclass C>, \u003Cclass A>, \u003Cclass object>)\n```\n\n**MRO 规则**：C3 算法保证：\n1. 子类在父类前面\n2. 多个父类按声明顺序排列\n3. 单调性（父类的相对顺序保持不变）\n\n`super()` 不是\"调用父类\"，是\"按 MRO 顺序调用下一个类\"，这在多继承中至关重要。\n\n---\n\n## 三种方法类型\n\n```python\nclass Circle:\n    PI = 3.14159\n\n    def __init__(self, radius: float):\n        self.radius = radius\n\n    # 实例方法：第一个参数是 self（实例）\n    def area(self) -> float:\n        return self.PI * self.radius ** 2\n\n    # 类方法：第一个参数是 cls（类本身），可通过类或实例调用\n    @classmethod\n    def from_diameter(cls, diameter: float) -> \"Circle\":\n        return cls(diameter \u002F 2)\n\n    # 静态方法：没有 self 或 cls，只是逻辑上属于这个类的函数\n    @staticmethod\n    def is_valid_radius(r: float) -> bool:\n        return r > 0\n\nc1 = Circle(5)\nc2 = Circle.from_diameter(10)  # 类方法\nCircle.is_valid_radius(-1)      # False\n```\n\n---\n\n## @property：受控属性访问\n\n```python\nclass Temperature:\n    def __init__(self, celsius: float = 0):\n        self._celsius = celsius  # 约定：_ 前缀表示\"内部使用\"\n\n    @property\n    def celsius(self) -> float:\n        return self._celsius\n\n    @celsius.setter\n    def celsius(self, value: float):\n        if value \u003C -273.15:\n            raise ValueError(f\"Temperature {value} below absolute zero!\")\n        self._celsius = value\n\n    @celsius.deleter\n    def celsius(self):\n        print(\"Deleting temperature\")\n        del self._celsius\n\n    @property\n    def fahrenheit(self) -> float:\n        # 只读属性（没有 setter）\n        return self._celsius * 9\u002F5 + 32\n\nt = Temperature(25)\nprint(t.celsius)     # 25\nprint(t.fahrenheit)  # 77.0\nt.celsius = 100      # 调用 setter\n# t.celsius = -300   # ValueError!\ndel t.celsius        # 调用 deleter\n```\n\n---\n\n## __slots__：内存优化\n\n默认情况下，Python 对象把实例属性存在 `__dict__`（字典）中，灵活但占内存。\n\n```python\nimport sys\n\nclass PointDict:\n    def __init__(self, x, y):\n        self.x = x\n        self.y = y\n\nclass PointSlots:\n    __slots__ = (\"x\", \"y\")   # 声明允许的属性\n\n    def __init__(self, x, y):\n        self.x = x\n        self.y = y\n\npd = PointDict(1, 2)\nps = PointSlots(1, 2)\n\nprint(sys.getsizeof(pd.__dict__))   # ~232 bytes\nprint(sys.getsizeof(ps))            # ~56 bytes（小得多）\n\n# __slots__ 的限制：\n# ps.z = 3  # AttributeError：不能动态添加属性\n```\n\n适合场景：创建大量小对象（如游戏中的粒子、数据点）时，`__slots__` 可节省 30-50% 内存。\n\n---\n\n## 容器类魔术方法\n\n```python\nclass FrozenList:\n    # 一个不可修改的列表\n\n    def __init__(self, data):\n        self._data = list(data)\n\n    def __len__(self) -> int:\n        return len(self._data)\n\n    def __getitem__(self, index):\n        return self._data[index]  # 支持切片（因为 list 本身支持切片）\n\n    def __iter__(self):\n        return iter(self._data)   # 让对象可迭代\n\n    def __contains__(self, item) -> bool:\n        return item in self._data\n\n    def __repr__(self) -> str:\n        return f\"FrozenList({self._data!r})\"\n\nfl = FrozenList([1, 2, 3, 4, 5])\nprint(len(fl))          # 5\nprint(fl[1:3])          # [2, 3]（切片）\nprint(3 in fl)          # True\nfor x in fl: print(x)  # 可迭代\n```\n\n---\n\n## 运算符重载\n\n```python\nclass Vector:\n    def __init__(self, x, y):\n        self.x, self.y = x, y\n\n    def __add__(self, other):         # v1 + v2\n        return Vector(self.x + other.x, self.y + other.y)\n\n    def __sub__(self, other):         # v1 - v2\n        return Vector(self.x - other.x, self.y - other.y)\n\n    def __mul__(self, scalar):        # v * 3\n        return Vector(self.x * scalar, self.y * scalar)\n\n    def __rmul__(self, scalar):       # 3 * v（反向）\n        return self.__mul__(scalar)\n\n    def __neg__(self):                # -v\n        return Vector(-self.x, -self.y)\n\n    def __abs__(self):                # abs(v)\n        return (self.x**2 + self.y**2) ** 0.5\n\n    def __lt__(self, other):          # v1 \u003C v2（按模长）\n        return abs(self) \u003C abs(other)\n\n    def __bool__(self):               # bool(v)（零向量为 False）\n        return self.x != 0 or self.y != 0\n\n    def __repr__(self):\n        return f\"Vector({self.x}, {self.y})\"\n\nv1 = Vector(1, 2)\nv2 = Vector(3, 4)\nprint(v1 + v2)   # Vector(4, 6)\nprint(2 * v1)    # Vector(2, 4)\nprint(abs(v2))   # 5.0\n```\n\n---\n\n## 上下文管理器：__enter__ \u002F __exit__\n\n```python\nclass DatabaseConnection:\n    def __init__(self, url: str):\n        self.url = url\n        self.conn = None\n\n    def __enter__(self):\n        print(f\"Connecting to {self.url}\")\n        self.conn = {\"connected\": True}  # 模拟连接\n        return self.conn\n\n    def __exit__(self, exc_type, exc_val, exc_tb):\n        print(\"Closing connection\")\n        self.conn = None\n        # 返回 True 表示吞掉异常；返回 False\u002FNone 表示异常继续传播\n        return False\n\nwith DatabaseConnection(\"postgresql:\u002F\u002Flocalhost\u002Fdb\") as conn:\n    print(f\"Got connection: {conn}\")\n```\n\n---\n\n## 描述符协议\n\n描述符是 Python 属性访问机制的底层实现，`@property`、`@classmethod`、`@staticmethod` 都是描述符。\n\n```python\nclass Validator:\n    # 可复用的属性验证描述符\n\n    def __set_name__(self, owner, name):\n        self.name = name\n        self.private_name = \"_\" + name\n\n    def __get__(self, obj, objtype=None):\n        if obj is None:\n            return self    # 通过类访问时返回描述符本身\n        return getattr(obj, self.private_name, None)\n\n    def __set__(self, obj, value):\n        self.validate(value)\n        setattr(obj, self.private_name, value)\n\n    def validate(self, value):\n        pass  # 子类实现\n\nclass PositiveNumber(Validator):\n    def validate(self, value):\n        if not isinstance(value, (int, float)) or value \u003C= 0:\n            raise ValueError(f\"{self.name} must be positive, got {value!r}\")\n\nclass Circle:\n    radius = PositiveNumber()\n\n    def __init__(self, radius):\n        self.radius = radius  # 触发 PositiveNumber.__set__\n\nc = Circle(5)    # OK\n# Circle(-1)    # ValueError!\n```\n\n---\n\n## 抽象类（ABC）\n\n```python\nfrom abc import ABC, abstractmethod\n\nclass Shape(ABC):\n    @abstractmethod\n    def area(self) -> float:\n        pass  # 子类必须实现\n\n    @abstractmethod\n    def perimeter(self) -> float:\n        pass  # 子类必须实现\n\n    def describe(self) -> str:\n        return f\"Shape with area={self.area():.2f}, perimeter={self.perimeter():.2f}\"\n\nclass Rectangle(Shape):\n    def __init__(self, w, h):\n        self.w, self.h = w, h\n\n    def area(self) -> float:\n        return self.w * self.h\n\n    def perimeter(self) -> float:\n        return 2 * (self.w + self.h)\n\n# Shape()  # TypeError：不能实例化抽象类\nrect = Rectangle(3, 4)\nprint(rect.describe())  # Shape with area=12.00, perimeter=14.00\n```\n\n---\n\n## dataclass：告别样板代码\n\n```python\nfrom dataclasses import dataclass, field\nfrom typing import List\n\n@dataclass\nclass Point:\n    x: float\n    y: float\n\n    def distance_to_origin(self) -> float:\n        return (self.x**2 + self.y**2) ** 0.5\n\n@dataclass(frozen=True)   # 不可变（自动生成 __hash__）\nclass ImmutablePoint:\n    x: float\n    y: float\n\n@dataclass\nclass Team:\n    name: str\n    members: List[str] = field(default_factory=list)   # 可变默认值必须用 field\n    captain: str = \"\"\n\n    def __post_init__(self):\n        # 初始化后处理\n        if self.captain and self.captain not in self.members:\n            self.members.append(self.captain)\n\n# dataclass 自动生成：__init__、__repr__、__eq__\np = Point(3, 4)\nprint(p)               # Point(x=3, y=4)\nprint(p.distance_to_origin())  # 5.0\n```\n\n---\n\n## 综合示例：自定义链表容器\n\n```python\nfrom typing import Iterator, TypeVar, Generic, Optional\n\nT = TypeVar(\"T\")\n\nclass LinkedList(Generic[T]):\n    # 链表：可迭代、支持 with 语句、支持 + 运算\n\n    class Node:\n        __slots__ = (\"value\", \"next\")\n        def __init__(self, value):\n            self.value = value\n            self.next = None\n\n    def __init__(self):\n        self._head = None\n        self._size = 0\n\n    def append(self, value) -> None:\n        node = self.Node(value)\n        if not self._head:\n            self._head = node\n        else:\n            cur = self._head\n            while cur.next:\n                cur = cur.next\n            cur.next = node\n        self._size += 1\n\n    def __len__(self) -> int:\n        return self._size\n\n    def __iter__(self):\n        cur = self._head\n        while cur:\n            yield cur.value\n            cur = cur.next\n\n    def __contains__(self, value) -> bool:\n        return any(v == value for v in self)\n\n    def __add__(self, other):\n        result = LinkedList()\n        for v in self: result.append(v)\n        for v in other: result.append(v)\n        return result\n\n    def __repr__(self) -> str:\n        return f\"LinkedList([{', '.join(repr(v) for v in self)}])\"\n\n    def __enter__(self):\n        return self\n\n    def __exit__(self, *args) -> bool:\n        self._head = None\n        self._size = 0\n        return False\n\n# 使用\nwith LinkedList() as ll:\n    ll.append(1)\n    ll.append(2)\n    ll.append(3)\n    print(ll)        # LinkedList([1, 2, 3])\n    print(2 in ll)   # True\n# 退出 with：链表自动清空\n```\n","\u003Ch1>Python 面向对象：\u003Cstrong>init\u003C\u002Fstrong> 之外你需要知道的\u003C\u002Fh1>\n\u003Cp>Python OOP 不只是 \u003Ccode>class + __init__\u003C\u002Fcode>，魔术方法、描述符、元类才是真正的武器。这篇从基础到进阶，系统梳理 Python OOP 的全貌。\u003C\u002Fp>\n\u003Chr>\n\u003Ch2 id=\"类的基础-五个必知魔术方法\">类的基础：五个必知魔术方法\u003C\u002Fh2>\n\u003Cpre>\u003Ccode class=\"language-python\">class Vector:\n    def __init__(self, x: float, y: float):\n        self.x = x\n        self.y = y\n\n    def __repr__(self) -> str:\n        # 开发者用，调试时显示，eval() 可还原\n        return f"Vector({self.x!r}, {self.y!r})"\n\n    def __str__(self) -> str:\n        # 用户友好，print() 时调用；未定义则退化到 __repr__\n        return f"({self.x}, {self.y})"\n\n    def __eq__(self, other) -> bool:\n        # 定义 == 的行为\n        if not isinstance(other, Vector):\n            return NotImplemented\n        return self.x == other.x and self.y == other.y\n\n    def __hash__(self) -> int:\n        # 定义 hash()，使对象可作 dict key\u002Fset 元素\n        # 注意：定义了 __eq__ 后必须显式定义 __hash__，否则不可哈希\n        return hash((self.x, self.y))\n\nv1 = Vector(1, 2)\nv2 = Vector(1, 2)\nprint(repr(v1))   # Vector(1, 2)\nprint(str(v1))    # (1, 2)\nprint(v1 == v2)   # True\nd = {v1: "origin"}  # 可以，因为有 __hash__\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Chr>\n\u003Ch2 id=\"继承与-mro\">继承与 MRO\u003C\u002Fh2>\n\u003Ch3 id=\"单继承\">单继承\u003C\u002Fh3>\n\u003Cpre>\u003Ccode class=\"language-python\">class Animal:\n    def __init__(self, name: str):\n        self.name = name\n\n    def speak(self) -> str:\n        raise NotImplementedError\n\nclass Dog(Animal):\n    def speak(self) -> str:\n        return f"{self.name} says Woof!"\n\nclass Cat(Animal):\n    def speak(self) -> str:\n        return f"{self.name} says Meow!"\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Ch3 id=\"多继承与-mro-c3-线性化\">多继承与 MRO（C3 线性化）\u003C\u002Fh3>\n\u003Cpre>\u003Ccode class=\"language-python\">class A:\n    def greet(self): return "A"\n\nclass B(A):\n    def greet(self): return "B -> " + super().greet()\n\nclass C(A):\n    def greet(self): return "C -> " + super().greet()\n\nclass D(B, C):\n    def greet(self): return "D -> " + super().greet()\n\nprint(D().greet())   # D -> B -> C -> A\nprint(D.__mro__)\n# (<class D>, <class B>, <class C>, <class A>, <class object>)\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Cp>\u003Cstrong>MRO 规则\u003C\u002Fstrong>：C3 算法保证：\u003C\u002Fp>\n\u003Col>\n\u003Cli>子类在父类前面\u003C\u002Fli>\n\u003Cli>多个父类按声明顺序排列\u003C\u002Fli>\n\u003Cli>单调性（父类的相对顺序保持不变）\u003C\u002Fli>\n\u003C\u002Fol>\n\u003Cp>\u003Ccode>super()\u003C\u002Fcode> 不是"调用父类"，是"按 MRO 顺序调用下一个类"，这在多继承中至关重要。\u003C\u002Fp>\n\u003Chr>\n\u003Ch2 id=\"三种方法类型\">三种方法类型\u003C\u002Fh2>\n\u003Cpre>\u003Ccode class=\"language-python\">class Circle:\n    PI = 3.14159\n\n    def __init__(self, radius: float):\n        self.radius = radius\n\n    # 实例方法：第一个参数是 self（实例）\n    def area(self) -> float:\n        return self.PI * self.radius ** 2\n\n    # 类方法：第一个参数是 cls（类本身），可通过类或实例调用\n    @classmethod\n    def from_diameter(cls, diameter: float) -> "Circle":\n        return cls(diameter \u002F 2)\n\n    # 静态方法：没有 self 或 cls，只是逻辑上属于这个类的函数\n    @staticmethod\n    def is_valid_radius(r: float) -> bool:\n        return r > 0\n\nc1 = Circle(5)\nc2 = Circle.from_diameter(10)  # 类方法\nCircle.is_valid_radius(-1)      # False\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Chr>\n\u003Ch2 id=\"property-受控属性访问\">@property：受控属性访问\u003C\u002Fh2>\n\u003Cpre>\u003Ccode class=\"language-python\">class Temperature:\n    def __init__(self, celsius: float = 0):\n        self._celsius = celsius  # 约定：_ 前缀表示"内部使用"\n\n    @property\n    def celsius(self) -> float:\n        return self._celsius\n\n    @celsius.setter\n    def celsius(self, value: float):\n        if value < -273.15:\n            raise ValueError(f"Temperature {value} below absolute zero!")\n        self._celsius = value\n\n    @celsius.deleter\n    def celsius(self):\n        print("Deleting temperature")\n        del self._celsius\n\n    @property\n    def fahrenheit(self) -> float:\n        # 只读属性（没有 setter）\n        return self._celsius * 9\u002F5 + 32\n\nt = Temperature(25)\nprint(t.celsius)     # 25\nprint(t.fahrenheit)  # 77.0\nt.celsius = 100      # 调用 setter\n# t.celsius = -300   # ValueError!\ndel t.celsius        # 调用 deleter\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Chr>\n\u003Ch2 id=\"slots-内存优化\">\u003Cstrong>slots\u003C\u002Fstrong>：内存优化\u003C\u002Fh2>\n\u003Cp>默认情况下，Python 对象把实例属性存在 \u003Ccode>__dict__\u003C\u002Fcode>（字典）中，灵活但占内存。\u003C\u002Fp>\n\u003Cpre>\u003Ccode class=\"language-python\">import sys\n\nclass PointDict:\n    def __init__(self, x, y):\n        self.x = x\n        self.y = y\n\nclass PointSlots:\n    __slots__ = ("x", "y")   # 声明允许的属性\n\n    def __init__(self, x, y):\n        self.x = x\n        self.y = y\n\npd = PointDict(1, 2)\nps = PointSlots(1, 2)\n\nprint(sys.getsizeof(pd.__dict__))   # ~232 bytes\nprint(sys.getsizeof(ps))            # ~56 bytes（小得多）\n\n# __slots__ 的限制：\n# ps.z = 3  # AttributeError：不能动态添加属性\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Cp>适合场景：创建大量小对象（如游戏中的粒子、数据点）时，\u003Ccode>__slots__\u003C\u002Fcode> 可节省 30-50% 内存。\u003C\u002Fp>\n\u003Chr>\n\u003Ch2 id=\"容器类魔术方法\">容器类魔术方法\u003C\u002Fh2>\n\u003Cpre>\u003Ccode class=\"language-python\">class FrozenList:\n    # 一个不可修改的列表\n\n    def __init__(self, data):\n        self._data = list(data)\n\n    def __len__(self) -> int:\n        return len(self._data)\n\n    def __getitem__(self, index):\n        return self._data[index]  # 支持切片（因为 list 本身支持切片）\n\n    def __iter__(self):\n        return iter(self._data)   # 让对象可迭代\n\n    def __contains__(self, item) -> bool:\n        return item in self._data\n\n    def __repr__(self) -> str:\n        return f"FrozenList({self._data!r})"\n\nfl = FrozenList([1, 2, 3, 4, 5])\nprint(len(fl))          # 5\nprint(fl[1:3])          # [2, 3]（切片）\nprint(3 in fl)          # True\nfor x in fl: print(x)  # 可迭代\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Chr>\n\u003Ch2 id=\"运算符重载\">运算符重载\u003C\u002Fh2>\n\u003Cpre>\u003Ccode class=\"language-python\">class Vector:\n    def __init__(self, x, y):\n        self.x, self.y = x, y\n\n    def __add__(self, other):         # v1 + v2\n        return Vector(self.x + other.x, self.y + other.y)\n\n    def __sub__(self, other):         # v1 - v2\n        return Vector(self.x - other.x, self.y - other.y)\n\n    def __mul__(self, scalar):        # v * 3\n        return Vector(self.x * scalar, self.y * scalar)\n\n    def __rmul__(self, scalar):       # 3 * v（反向）\n        return self.__mul__(scalar)\n\n    def __neg__(self):                # -v\n        return Vector(-self.x, -self.y)\n\n    def __abs__(self):                # abs(v)\n        return (self.x**2 + self.y**2) ** 0.5\n\n    def __lt__(self, other):          # v1 < v2（按模长）\n        return abs(self) < abs(other)\n\n    def __bool__(self):               # bool(v)（零向量为 False）\n        return self.x != 0 or self.y != 0\n\n    def __repr__(self):\n        return f"Vector({self.x}, {self.y})"\n\nv1 = Vector(1, 2)\nv2 = Vector(3, 4)\nprint(v1 + v2)   # Vector(4, 6)\nprint(2 * v1)    # Vector(2, 4)\nprint(abs(v2))   # 5.0\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Chr>\n\u003Ch2 id=\"上下文管理器-enter-exit\">上下文管理器：\u003Cstrong>enter\u003C\u002Fstrong> \u002F \u003Cstrong>exit\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cpre>\u003Ccode class=\"language-python\">class DatabaseConnection:\n    def __init__(self, url: str):\n        self.url = url\n        self.conn = None\n\n    def __enter__(self):\n        print(f"Connecting to {self.url}")\n        self.conn = {"connected": True}  # 模拟连接\n        return self.conn\n\n    def __exit__(self, exc_type, exc_val, exc_tb):\n        print("Closing connection")\n        self.conn = None\n        # 返回 True 表示吞掉异常；返回 False\u002FNone 表示异常继续传播\n        return False\n\nwith DatabaseConnection("postgresql:\u002F\u002Flocalhost\u002Fdb") as conn:\n    print(f"Got connection: {conn}")\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Chr>\n\u003Ch2 id=\"描述符协议\">描述符协议\u003C\u002Fh2>\n\u003Cp>描述符是 Python 属性访问机制的底层实现，\u003Ccode>@property\u003C\u002Fcode>、\u003Ccode>@classmethod\u003C\u002Fcode>、\u003Ccode>@staticmethod\u003C\u002Fcode> 都是描述符。\u003C\u002Fp>\n\u003Cpre>\u003Ccode class=\"language-python\">class Validator:\n    # 可复用的属性验证描述符\n\n    def __set_name__(self, owner, name):\n        self.name = name\n        self.private_name = "_" + name\n\n    def __get__(self, obj, objtype=None):\n        if obj is None:\n            return self    # 通过类访问时返回描述符本身\n        return getattr(obj, self.private_name, None)\n\n    def __set__(self, obj, value):\n        self.validate(value)\n        setattr(obj, self.private_name, value)\n\n    def validate(self, value):\n        pass  # 子类实现\n\nclass PositiveNumber(Validator):\n    def validate(self, value):\n        if not isinstance(value, (int, float)) or value <= 0:\n            raise ValueError(f"{self.name} must be positive, got {value!r}")\n\nclass Circle:\n    radius = PositiveNumber()\n\n    def __init__(self, radius):\n        self.radius = radius  # 触发 PositiveNumber.__set__\n\nc = Circle(5)    # OK\n# Circle(-1)    # ValueError!\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Chr>\n\u003Ch2 id=\"抽象类-abc\">抽象类（ABC）\u003C\u002Fh2>\n\u003Cpre>\u003Ccode class=\"language-python\">from abc import ABC, abstractmethod\n\nclass Shape(ABC):\n    @abstractmethod\n    def area(self) -> float:\n        pass  # 子类必须实现\n\n    @abstractmethod\n    def perimeter(self) -> float:\n        pass  # 子类必须实现\n\n    def describe(self) -> str:\n        return f"Shape with area={self.area():.2f}, perimeter={self.perimeter():.2f}"\n\nclass Rectangle(Shape):\n    def __init__(self, w, h):\n        self.w, self.h = w, h\n\n    def area(self) -> float:\n        return self.w * self.h\n\n    def perimeter(self) -> float:\n        return 2 * (self.w + self.h)\n\n# Shape()  # TypeError：不能实例化抽象类\nrect = Rectangle(3, 4)\nprint(rect.describe())  # Shape with area=12.00, perimeter=14.00\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Chr>\n\u003Ch2 id=\"dataclass-告别样板代码\">dataclass：告别样板代码\u003C\u002Fh2>\n\u003Cpre>\u003Ccode class=\"language-python\">from dataclasses import dataclass, field\nfrom typing import List\n\n@dataclass\nclass Point:\n    x: float\n    y: float\n\n    def distance_to_origin(self) -> float:\n        return (self.x**2 + self.y**2) ** 0.5\n\n@dataclass(frozen=True)   # 不可变（自动生成 __hash__）\nclass ImmutablePoint:\n    x: float\n    y: float\n\n@dataclass\nclass Team:\n    name: str\n    members: List[str] = field(default_factory=list)   # 可变默认值必须用 field\n    captain: str = ""\n\n    def __post_init__(self):\n        # 初始化后处理\n        if self.captain and self.captain not in self.members:\n            self.members.append(self.captain)\n\n# dataclass 自动生成：__init__、__repr__、__eq__\np = Point(3, 4)\nprint(p)               # Point(x=3, y=4)\nprint(p.distance_to_origin())  # 5.0\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Chr>\n\u003Ch2 id=\"综合示例-自定义链表容器\">综合示例：自定义链表容器\u003C\u002Fh2>\n\u003Cpre>\u003Ccode class=\"language-python\">from typing import Iterator, TypeVar, Generic, Optional\n\nT = TypeVar("T")\n\nclass LinkedList(Generic[T]):\n    # 链表：可迭代、支持 with 语句、支持 + 运算\n\n    class Node:\n        __slots__ = ("value", "next")\n        def __init__(self, value):\n            self.value = value\n            self.next = None\n\n    def __init__(self):\n        self._head = None\n        self._size = 0\n\n    def append(self, value) -> None:\n        node = self.Node(value)\n        if not self._head:\n            self._head = node\n        else:\n            cur = self._head\n            while cur.next:\n                cur = cur.next\n            cur.next = node\n        self._size += 1\n\n    def __len__(self) -> int:\n        return self._size\n\n    def __iter__(self):\n        cur = self._head\n        while cur:\n            yield cur.value\n            cur = cur.next\n\n    def __contains__(self, value) -> bool:\n        return any(v == value for v in self)\n\n    def __add__(self, other):\n        result = LinkedList()\n        for v in self: result.append(v)\n        for v in other: result.append(v)\n        return result\n\n    def __repr__(self) -> str:\n        return f"LinkedList([{', '.join(repr(v) for v in self)}])"\n\n    def __enter__(self):\n        return self\n\n    def __exit__(self, *args) -> bool:\n        self._head = None\n        self._size = 0\n        return False\n\n# 使用\nwith LinkedList() as ll:\n    ll.append(1)\n    ll.append(2)\n    ll.append(3)\n    print(ll)        # LinkedList([1, 2, 3])\n    print(2 in ll)   # True\n# 退出 with：链表自动清空\n\u003C\u002Fcode>\u003C\u002Fpre>\n","2026-05-03",[11,12,13,14],"python","OOP","面向对象","魔术方法",false,[17,30,41,53,62,69,76,83,90,97,107,116,125,128,136,144,153,162,171,181,188,198,204,211,217,226,233,240,248,258,267,276,286,296,306,314,324,335,345,354,362,368,376,384,392,400,408,415],{"slug":18,"title":19,"description":20,"pub_date":21,"tags":22,"draft":15,"word_count":29},"ide-skills-guide","Agent Skills 完全指南：21 款第三方 Skill 深度评测与使用心得","全面评测 21 款第三方 Agent Skills，涵盖 Vue 生态、前端设计、构建工具、实用工具四大分类。从安装配置到实际使用场景，带你了解每个 Skill 的功能特点、最佳实践与使用心得。","2026-06-15",[23,24,25,26,27,28],"agent","skills","AI","效率工具","前端","Vue",4169,{"slug":31,"title":32,"description":33,"pub_date":34,"tags":35,"draft":15,"word_count":40},"linux-kernel-skeleton-struct-funcptr-container_of","Linux 内核骨架：struct、函数指针与 container_of","读懂 Linux 内核源码的三件套：巨大的 struct 组合代替继承、函数指针表实现虚派发、container_of 宏从嵌入成员找回完整对象。","2026-05-09",[36,37,38,39],"linux","kernel","C","container_of",1369,{"slug":42,"title":43,"description":44,"pub_date":45,"tags":46,"draft":15,"word_count":52},"astro-complete-guide-2025","Astro 5 深度剖析：Islands 架构原理、构建优化与 Cloudflare Workers 边缘部署","从编译器视角解析 Astro 5 的 Islands 架构实现原理，Content Layer API 的 Vite 插件机制，Server Islands 的流式渲染，以及如何在 Cloudflare Workers + D1 边缘环境下榨干性能。","2026-05-08",[47,48,49,50,51],"astro","frontend","cloudflare","performance","architecture",3663,{"slug":54,"title":55,"description":56,"pub_date":9,"tags":57,"draft":15,"word_count":61},"llm-prompt-engineering","Prompt Engineering 实战：让 LLM 真正听话的技巧","System prompt 怎么写、Few-shot 怎么设计、Chain-of-Thought 原理，以及常见失败模式和调试方法。",[58,59,60],"ai","llm","工程实践",1723,{"slug":63,"title":64,"description":65,"pub_date":9,"tags":66,"draft":15,"word_count":68},"rag-system-design","RAG 系统设计：从 naive 到 production-ready","Retrieval-Augmented Generation 不只是「向量数据库 + LLM」，分块策略、召回质量、重排序、缓存才是工程核心。",[58,67,59,60],"rag",1613,{"slug":70,"title":71,"description":72,"pub_date":9,"tags":73,"draft":15,"word_count":75},"git-advanced-workflow","Git 进阶工作流：rebase、cherry-pick、bisect 的正确使用","merge 会了，但 rebase 总搞错？bisect 找 bug 提交？interactive rebase 整理历史？这篇一次说清楚。",[74,60],"git",1396,{"slug":77,"title":78,"description":79,"pub_date":9,"tags":80,"draft":15,"word_count":82},"docker-practical-guide","Docker 实战：从会用到用好","会 docker run 不够，Dockerfile 最佳实践、多阶段构建、Compose 编排、镜像瘦身才是日常真正需要的。",[81,36,60],"docker",1268,{"slug":84,"title":85,"description":86,"pub_date":9,"tags":87,"draft":15,"word_count":89},"anthropics-skills-guide","anthropics\u002Fskills：Anthropic 官方 Agent Skills 仓库解析","Anthropic 官方开源的 Agent Skills 标准仓库，127k stars，解析 SKILL.md 规范、17 个示例 skill 的设计模式，以及如何在 Claude Code \u002F Claude.ai \u002F API 中使用",[58,88,23,24],"Claude",2090,{"slug":91,"title":92,"description":93,"pub_date":9,"tags":94,"draft":15,"word_count":96},"karpathy-claude-code-guidelines","Karpathy 的 LLM 编码批评与 CLAUDE.md 最佳实践","基于 Andrej Karpathy 对 LLM 编程助手的观察，forrestchang 提炼出一个 CLAUDE.md 文件，4 条原则解决 AI 编码的典型失控问题：乱猜假设、过度设计、乱改代码、目标不清",[58,88,95,60],"Claude Code",2699,{"slug":98,"title":99,"description":100,"pub_date":9,"tags":101,"draft":15,"word_count":106},"typescript-advanced-patterns","TypeScript 高级模式：让类型系统为你工作","基础 TS 会了但类型总是 any？条件类型、映射类型、模板字面量类型、infer 关键字才是 TS 的真正威力。",[102,103,104,105],"typescript","类型系统","前端工程","高级模式",1419,{"slug":108,"title":109,"description":110,"pub_date":9,"tags":111,"draft":15,"word_count":115},"linux-performance-tuning","Linux 性能调优实战：从 top 到 perf 的完整工具链","遇到性能问题不知道从哪下手？这篇建立系统化的排查思路，从 CPU\u002F内存\u002FIO\u002F网络逐层分析。",[36,112,113,114],"性能","运维","系统编程",1524,{"slug":117,"title":118,"description":119,"pub_date":9,"tags":120,"draft":15,"word_count":124},"python-functional-programming","Python 函数式编程：map\u002Ffilter\u002Freduce 之外","Python 不是纯函数式语言，但 functools、itertools、偏函数、闭包这些工具用好了能让代码简洁一个量级。",[11,121,122,123],"函数式","闭包","装饰器",1867,{"slug":4,"title":5,"description":6,"pub_date":9,"tags":126,"draft":15,"word_count":127},[11,12,13,14],1792,{"slug":129,"title":130,"description":131,"pub_date":9,"tags":132,"draft":15,"word_count":135},"python-data-structures","Python 内置数据结构深度解析","list、dict、set、tuple 不只是数据容器，搞懂它们的底层实现和时间复杂度，才能写出高性能 Python。",[11,133,112,134],"数据结构","算法",1517,{"slug":137,"title":138,"description":139,"pub_date":9,"tags":140,"draft":15,"word_count":143},"python-basics-quick-start","Python 快速上手：写给有编程基础的人","已经会其他语言，想快速掌握 Python 的语法特性和思维方式，这篇是捷径。",[11,141,142],"入门","基础",1607,{"slug":145,"title":146,"description":147,"pub_date":9,"tags":148,"draft":15,"word_count":152},"python-dataclass-pydantic","Python dataclass vs Pydantic：数据类选型指南","dataclass 是标准库的轻量选择，Pydantic v2 是带验证的重武器，什么时候用哪个，这篇说清楚。",[11,149,150,151],"dataclass","pydantic","数据验证",1323,{"slug":154,"title":155,"description":156,"pub_date":9,"tags":157,"draft":15,"word_count":161},"python-asyncio-practical","Python asyncio 实战：从回调地狱到协程优雅","asyncio 是 Python 异步编程的核心，搞懂 event loop、Task、gather 这些概念才能写出真正高效的异步代码。",[11,158,159,160],"asyncio","并发","网络编程",1258,{"slug":163,"title":164,"description":165,"pub_date":9,"tags":166,"draft":15,"word_count":170},"python-type-hints-guide","Python 类型注解完全指南：从入门到实践","Python 3.5+ 引入类型注解，配合 mypy\u002Fpyright 让 Python 也能享受静态类型检查的好处。",[11,167,168,169],"typescript-style","type-hints","工具链",1102,{"slug":172,"title":173,"description":174,"pub_date":175,"tags":176,"draft":15,"word_count":180},"pwa-install-update-button","PWA 踩坑：为什么安装按钮从来不出现","从 beforeinstallprompt 到 Service Worker waiting，把 PWA 的安装与更新提示真正做对","2026-05-02",[177,178,179],"pwa","javascript","web",1683,{"slug":182,"title":183,"description":184,"pub_date":185,"tags":186,"draft":15,"word_count":187},"openclaw-vs-hermes-agent","OpenClaw vs Hermes Agent：两个本地优先 Agent 的设计差异","OpenClaw（Novita AI）和 Hermes Agent（Nous Research）都是本地运行的个人 AI Agent，但在记忆系统、技能学习、运行环境和模型生态上走了不同的路。深入对比两种架构的核心差异。","2026-05-01",[58,23,59],1679,{"slug":189,"title":190,"description":191,"pub_date":185,"tags":192,"draft":15,"word_count":197},"cpp-random-design-patterns","C++ 设计模式实战：RAII、观察者、工厂","用现代 C++（C++17\u002F20）实现三种高频设计模式：RAII 资源管理、观察者模式事件系统、工厂模式插件架构。每种模式给出问题场景、实现代码和真实工程案例。",[193,194,195,196],"cpp","设计模式","c++17","工程",2613,{"slug":199,"title":200,"description":201,"pub_date":185,"tags":202,"draft":15,"word_count":203},"data-structures-fundamentals","数据结构基础：从数组到红黑树","系统梳理常用数据结构的核心原理、时间复杂度和适用场景。数组、链表、栈、队列、哈希表、二叉树、堆、图，每种结构附实现要点和 C++ 代码片段。",[133,134,193,142],3004,{"slug":205,"title":206,"description":207,"pub_date":208,"tags":209,"draft":15,"word_count":210},"ai-agent-what-is","什么是 AI Agent？从 LLM 到自主执行","LLM 本身是无状态问答机，Agent 是什么让它’动’起来的？本文深入解析 Agent 的四个核心能力、ReAct 框架、工具调用原理，以及主流框架横向对比。","2026-04-30",[58,23,59],2116,{"slug":212,"title":213,"description":214,"pub_date":208,"tags":215,"draft":15,"word_count":216},"ai-agent-memory","AI Agent 的记忆系统：从上下文窗口到长期记忆","深入拆解 AI Agent 的四种记忆类型、上下文窗口压缩策略、RAG 向量检索原理，以及三种典型失败模式和工程选型建议。",[58,23,67],2052,{"slug":218,"title":219,"description":220,"pub_date":208,"tags":221,"draft":15,"word_count":225},"network-proxy-vpn-guide","代理与翻墙技术原理：从 HTTP 代理到现代协议","深入解析代理与 VPN 的本质区别，梳理从 SOCKS5 到 Shadowsocks、V2Ray\u002FXray、Hysteria2 的协议演进，以及机场订阅的技术本质。",[222,223,224],"网络","代理","协议",2148,{"slug":227,"title":228,"description":229,"pub_date":208,"tags":230,"draft":15,"word_count":143},"algorithm-binary-search","二分查找：永远写不对？记住这个模板","彻底搞清楚二分查找的边界问题：闭区间和左闭右开两套模板、三道经典 LeetCode 题目完整 C++ 实现，以及二分答案的进阶思路。",[134,231,232,193],"二分查找","leetcode",{"slug":234,"title":235,"description":236,"pub_date":208,"tags":237,"draft":15,"word_count":239},"algorithm-sliding-window","滑动窗口算法：从暴力到 O(n) 的思维跃迁","系统讲解滑动窗口算法的核心模板、适用题型，配合三道经典 LeetCode 题目的完整 C++ 实现，彻底理解双指针收缩思路。",[134,238,232,193],"滑动窗口",1943,{"slug":241,"title":242,"description":243,"pub_date":208,"tags":244,"draft":15,"word_count":247},"network-clash-config","Clash \u002F Mihomo 配置详解：规则、策略组与分流","深入解析 Clash\u002FMihomo 的核心配置结构，包括代理节点、策略组类型、规则优先级、DNS fake-ip 模式，以及一份实用的完整配置模板。",[222,245,223,246],"clash","配置",1292,{"slug":249,"title":250,"description":251,"pub_date":252,"tags":253,"draft":15,"word_count":257},"hid-hotplug","HID 设备热插拔检测：从 udev 到 node-hid","在 Linux 上用 node-hid + usb 库实现可靠的 USB HID 设备热插拔检测，踩坑记录","2026-04-28",[193,254,36,255,256],"hid","nodejs","electron",2039,{"slug":259,"title":260,"description":261,"pub_date":262,"tags":263,"draft":15,"word_count":266},"electron-ipc-types","Electron IPC 类型安全：从 any 到完全类型化","用 TypeScript 泛型封装 Electron IPC，彻底消灭 any，preload 契约集中管理","2026-04-25",[256,102,264,265],"ipc","vue",1446,{"slug":268,"title":269,"description":270,"pub_date":271,"tags":272,"draft":15,"word_count":275},"element-plus-popover-hide","手动关闭多个 el-popover（不用 v-model:visible）","通过 ref + Reflect.get 调用 hide() 方法手动关闭 Element Plus Popover，解释 Vue3 Proxy 导致无法直接调用实例方法的原因。","2024-10-25",[265,273,274],"element-plus","vue3",1321,{"slug":277,"title":278,"description":279,"pub_date":280,"tags":281,"draft":15,"word_count":285},"vite-vue3-ts-elementplus-pinia","用 Vite+（vp）从零搭建 Vue3 + TypeScript + Element Plus + Pinia + Vue Router","使用 Vite+ 统一工具链（vp）一条命令搭建 Vue3 全家桶，涵盖按需导入、Pinia store、路由配置，以及常见坑的解决方案。","2024-08-27",[265,282,102,273,283,284],"vite","pinia","vite-plus",1960,{"slug":287,"title":288,"description":289,"pub_date":290,"tags":291,"draft":15,"word_count":295},"cef-lnk2038-iterator-debug-level","CEF LNK2038：解决 _ITERATOR_DEBUG_LEVEL 不匹配错误","分析 CEF（Chromium Embedded Framework）集成时出现的 LNK2038 _ITERATOR_DEBUG_LEVEL 链接错误，从根本原因到解决方案的完整指南。","2024-05-07",[193,292,293,294],"CEF","Visual Studio","链接错误",1509,{"slug":297,"title":298,"description":299,"pub_date":300,"tags":301,"draft":15,"word_count":305},"npm-electron-install-fix","彻底解决 npm 安装 Electron 失败的问题","分析 npm install electron 失败的根本原因（下载二进制超时\u002F被墙），通过国内镜像（npmmirror）彻底解决，并介绍多种备选方案和常见错误排查。","2024-03-01",[256,302,303,304],"npm","前端工具链","国内镜像",1494,{"slug":307,"title":308,"description":309,"pub_date":310,"tags":311,"draft":15,"word_count":313},"git-out-of-memory","解决 git 报错：Fatal: Out of memory, malloc failed","分析 git 大仓库操作时出现 Out of memory malloc failed 的根本原因，通过调整 pack.windowMemory、http.postBuffer 和 git repack 彻底解决。","2024-01-31",[74,36,312],"工具",2244,{"slug":315,"title":316,"description":317,"pub_date":318,"tags":319,"draft":15,"word_count":323},"vmware-tools-install","在 VMware 虚拟机中安装 open-vm-tools 完整指南","详解 VMware Tools 的作用、open-vm-tools 与官方 VMware Tools 的区别，以及在 Ubuntu 虚拟机中安装并生效的完整步骤和常见问题排查。","2023-11-21",[320,36,321,322],"VMware","Ubuntu","虚拟机",2523,{"slug":325,"title":326,"description":327,"pub_date":328,"tags":329,"draft":15,"word_count":334},"load-balancing-algorithms","负载均衡算法完全指南：从轮询到一致性哈希","系统梳理静态与动态负载均衡算法，涵盖轮询、随机、权重、IP Hash、一致性 Hash、最少连接、最快响应等，并对比 Nginx、Dubbo、Spring Cloud LoadBalancer 的实现差异。","2023-11-15",[330,331,332,333],"分布式","负载均衡","Nginx","微服务",1764,{"slug":336,"title":337,"description":338,"pub_date":339,"tags":340,"draft":15,"word_count":344},"win-cw2a-ca2w","ATL 字符串转换：CW2A 与 CA2W 完全指南","详解 ATL 宏 CW2A\u002FCA2W 在 Unicode 与 ANSI 之间的字符串转换用法、头文件依赖、USES_CONVERSION 宏的作用与常见陷阱。","2023-06-09",[193,341,342,343],"windows","ATL","字符串",1665,{"slug":346,"title":347,"description":348,"pub_date":339,"tags":349,"draft":15,"word_count":353},"csharp-sendmessage-cpp","C# 通过 SendMessage 向 C++ 窗口发送消息与字符串","使用 P\u002FInvoke 调用 user32.dll 的 SendMessage，从 C# 发送自定义 WM_USER 消息及字符串指针给 C++ 原生窗口，并在 C++ 侧正确接收和转换。",[350,193,341,351,352],"C#","互操作","PInvoke",1554,{"slug":355,"title":356,"description":357,"pub_date":358,"tags":359,"draft":15,"word_count":361},"win-postmessage-vector","Windows PostMessage 跨线程传递 std::vector 指针","通过 PostMessage 在 Windows 消息队列中传递 std::vector 指针，使用 reinterpret_cast 将指针装入 LPARAM，并在接收方正确释放内存。","2023-05-26",[193,341,360],"WinAPI",1823,{"slug":363,"title":364,"description":365,"pub_date":358,"tags":366,"draft":15,"word_count":367},"exe-dll-single-package","将 EXE 和 DLL 打包成单一可执行文件","介绍两种将 exe 和依赖 dll 打包成单文件的方案：Enigma Virtual Box 和 WinRAR 自解压，适合发布 Windows 桌面程序时简化分发流程。",[341,193,312],1619,{"slug":369,"title":370,"description":371,"pub_date":358,"tags":372,"draft":15,"word_count":375},"cpp-random-mt19937","C++ 现代随机数生成：用 mt19937 彻底告别 rand()","深入讲解为什么 rand() 不够用，以及如何用 C++11 的 \u003Crandom> 库正确生成高质量随机数，涵盖 mt19937、各种分布和线程安全。",[193,373,374],"c++11","random",1549,{"slug":377,"title":378,"description":379,"pub_date":380,"tags":381,"draft":15,"word_count":383},"win-startup-registry","C++ 实现程序开机自启动：注册表方式详解","通过操作 Windows 注册表 Run 键实现程序开机自启动，包括 HKCU 与 HKLM 区别、完整封装代码、工作目录问题和 UAC 权限处理。","2022-12-26",[341,193,382],"registry",1201,{"slug":385,"title":386,"description":387,"pub_date":388,"tags":389,"draft":15,"word_count":391},"mfc-cstring-wparam","MFC 中 CString 与 WPARAM 之间的转换","详解 MFC 消息传递中 CString 无法直接强转为 WPARAM 的原因，以及两种正确的转换方案，并介绍结构体指针传递的正确姿势。","2022-11-25",[390,193,341],"mfc",1546,{"slug":393,"title":394,"description":395,"pub_date":396,"tags":397,"draft":15,"word_count":399},"duilib-static-build","正确编译 Duilib 静态库：避免 ATL 依赖和链接错误","详解如何用 DuiLib_Static.vcxproj 编译 Duilib 静态库，解决 VARIANT 未定义、Unicode 配置不匹配和 ATL 依赖等常见问题。","2022-08-24",[193,398,341,390],"duilib",2639,{"slug":401,"title":402,"description":403,"pub_date":404,"tags":405,"draft":15,"word_count":407},"mfc-dpi-adaptive","MFC 界面自适应不同分辨率","MFC 对话框程序实现控件和字体随分辨率自动缩放的完整方案，附 DPI Awareness 配置说明","2022-08-17",[390,193,341,406],"dpi",1414,{"slug":409,"title":410,"description":411,"pub_date":412,"tags":413,"draft":15,"word_count":414},"mfc-drag-window","MFC 无标题栏窗口客户区拖动：三种方法对比","MFC 对话框去掉标题栏后如何实现拖动移动窗口，三种方案完整实现与适用场景分析","2022-08-16",[390,193,341],1633,{"slug":416,"title":417,"description":418,"pub_date":419,"tags":420,"draft":15,"word_count":422},"algorithm-number-complement","整数的补数：位运算掩码解法","LeetCode 476 题，用掩码 XOR 实现整数补数，附 C++\u002FPython\u002FJava 三种实现及补数与补码的区别","2021-03-08",[134,421,232],"位运算",1374,[]]