"Python Cookbook" Learning Notes

Class and object of the 8th chapter 2016.5.3

8.1 Changing the object's string display __str__ and __repr__%s and%r, mentioned Eval, I didn't use it.

8.2 Formatting a custom string __format__

8.3 Let the object support context management, __enter__ and __exit__, you can use the WITH

8.4 Ways to save memory when creating a large number of objects __slot__,__slot__ is more of a memory-optimized tool than a wrapper tool to prevent users from adding new properties to an instance.

8.5 Encapsulating property names in a class

"Python Cookbook" Learning Notes