python's decorator&wrapper

[python's decorator&wrapper]

decorator

　　A function returning another function, usually applied as a function transformation using the @wrapper syntax. Common examples for decorators are classmethod() andstaticmethod().

　　The decorator syntax is merely syntactic sugar, the following two function definitions are semantically equivalent:

　　

　　The same concept exists for classes, but is less commonly used there.

udpate_wrapper:　把wrapped的属性值拷贝到wrapper

　　

wraps: partial of udpae_wrapper

　　

how to use ?

　　

参考:

1、http://docs.python.org/2.7/library/functools.html#functools.update_wrapper

2、http://www.liaoxuefeng.com/wiki/0014316089557264a6b348958f449949df42a6d3a2e542c000/0014318435599930270c0381a3b44db991cd6d858064ac0000