A: functools Module - Advanced Functions
https://www.cnblogs.com/zhbzz2007/p/6001827.html
II: return function
Three: anonymous function
Four: decorator
Five: partial function
Six: Closure
A: functools Module - Advanced Functions
https://www.cnblogs.com/zhbzz2007/p/6001827.html
II: return function
Three: anonymous function
Four: decorator
Five: partial function
Six: Closure