说明
1、在类的外部调用serialize()时自动调用。
2、__sleep()方法通常用于提交未提交的数据或类似的清理操作。如果有一些大对象，但不需要完全保存，这个功能非常有用。
实例
Output: Using the default text output, the message format is : MESSAGE_TYPE: LINE_NUM:[OBJECT:] MESSAGE There are 5 kind of message types : * (C) convention, for programming standard violation * (R) refactor, for bad code smell * (W) warning, for python specific problems * (E) error, for probable bugs in the code * (F) fatal, if an error occurred which prevented pylint from doing further processing.
推荐操作系统：windows7系统、PHP5.6、DELL G3电脑
