CLASS class DEFINITION的意思|示意

The definition is a simple one: The class is Post and extends AppModel, and you should set the class variable $name to post.

定义十分简单：类是 Post 并扩展 AppModel，并且应当将类变量 $name 设为 post。

An attribute associated with a class object. Class attributes are defined inside a class definition but outside any method.

类的属性：属于某个类的对象的属性。类的属性都在类定义的内部，在类内方法之外。

Registers a class definition with this container and marks the class as a singleton class.

用这个容器注册一个类定义，并将该类定义为一个单独的类。

Notice that now in a class definition, keyword arguments are allowed after the list of base classes—generally speaking, class Foo(*bases, **kwds): pass.

请注意，现在，在类定义中，关键字参数被允许出现在基类列表之后 — 通常来讲，即 class Foo(*bases, **kwds): pass。

If you've already pickled instances of a class that needs changing, you'll likely want to retrieve and update those instances so that they continue to function properly with the new class definition.

如果已经对某个类实例进行了pickle，而现在又需要更改这个类，则您可能要检索和更新那些实例，以便它们能在新的类定义下继续正常工作。

If the class is already loaded, the class definition reopens the class, allowing me to make changes.

如果已经加载了类，则类定义会重新打开类以允许我进行变更。