Classes are defined solely to inherit from some framework, where that framework is narrowed by a single class attribute.

单独定义类，以便从某框架继承类，而该框架受到单一的类属性限制。

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You may only extend a single class and inherit its method implementations.

您可能只扩展一个类并继承其方法实现。

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An easy way to visualize how the dynamic typing works is to imagine a single base class called PyObject from which all other object types in Python inherit.

一种直观演示动态类型化工作方式的简单方法是，设想单个名为pyobject的基类，让Python中的所有其他对象类型都继承它。

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