First, leave the original class definition intact so that it can be found when existing instances are unpickled.
首先，确保原来的类的定义没有被更改，以便在unpickle现有实例时可以找到它。
In this case, you assign the actual class name to the variable, effectively creating an alias to the original class (see Listing 3).
在这种情况下，您可以向该变量分配一个实际的类名称，有效地为原先的类创建一个别名(参见清单3)。
So, if any of those methods contain references to any fields in the original class, you get a compiler error because they are invisible to the superclass.
所以，如果这些方法中的任何一个方法含有对原始类中的任何字段的引用，就会得到一个编译错误，因为它们对超类是不可见的。
You can extend an ordinary class with arbitrary capabilities and invoke the new behaviors on a class, though they didn't exist when you wrote the original class.
可以为一个普通的类扩展任意的功能并调用类的新行为，尽管当编写原始类时它们根本不存在。
Instead, Python creates a generic class instance, applies the instance attributes that were pickled, and sets the instance's _class_ attribute to point to the original class.
相反，Python创建一个通用类实例，并应用已进行过pickle的实例属性，同时设置该实例的_ class_属性，使其指向原来的类。
Later, by accident, the original class representative was removed, but you chose me as the class representative of the class!
后来，因偶然，原课代表被撤了，您却选了我做这门课的课代表！
The method implementations of the original class interface are used to perform the exception handling for the failed methods in the class itself.
原始类接口的方法实现被用来执行该类自身的失败方法的异常处理。
For example, you can define a class and then use a different language to derive a class from your original class or call a method on the original class.
例如，可以定义一个类，然后使用不同的语言从原始类派生出另一个类或调用原始类的方法。
Fortunately, whenever ProGuard runs, it outputs a
幸运的是，每当混淆器运行时候，它都会输出到文件
Fortunately, whenever ProGuard runs, it outputs a
幸运的是，每当混淆器运行时候，它都会输出到文件
应用推荐