How to Understand Python's Descriptor?

Can someone explain python's Descriptor knowledge? Can someone explain python's Descriptor knowledge? Reply content: Old Article handling:

>>> class MyInt(int): ...     def square(self): ...             return self*self ...      >>> n = MyInt(2) >>> n.name = 'two' >>> n.square() 4 >>> n.name 'two' 

In short, a descriptor is a Python object, but this object is special in itsAttributeIs no longer accessed as a normal object, it is accessed through a method called descriptor protocol. These methods include _ get _, _ set _, and _ delete __. The Object Defining any method is called a descriptor. For example:

Common Object

class Parent(object):    name = 'p'class Person(Parent):    name = "zs"zhangsan = Person()zhangsan.name = "zhangsan"print zhangsan.name#>> zhangsan

I thought it was the new awesome feature in Python3.4, and it was also linked with the single inheritance. I quickly flipped through the document.

Descriptor is a class of objects that implement the _ get _ (), _ set _ (), _ delete _ () methods. No. That's it. If you do not understand it, study duck typing.

There are a lot of purposes. Encapsulate a function into a property, and package the property into a private property. The python decorator syntax of the image. After the foo function is decorated, it is no longer the original function,
@ Logger is the syntactic sugar of foo = logger (foo,
Foo is the return value inner of logger (foo), inner is a function, foo (5)
The form parameter equal to the inner (5). inner function is the variable length parameter * args, ** kwargs,
You can upload data in the form of tuples or dictionaries.

Two Essays at the entry level

Concise Python magic -1
Concise Python magic -2