super collapse ii

English documents:super([type[, object-or-type]]) Return a proxy object, delegates method calls to a parent or sibling class of type. This is useful for accessing inherited methods that has been overridden in a class. The search order is same as, used by getattr() except, the type itself is skipped.The __mro__ attribute of the type lists the method resolution search order used by both getattr() and super() . The attribute is dynamic and can wheneve

Python advanced-MRO and super in succession Write in front If not specifically stated, the following are based on Python3 SummaryThis article describes Python how an inheritance relationship can be super() returned by calling the "parent class" method, super(Type, CurrentClass) returning the proxy for the CurrentClass MRO Type next class, and how to des

This article mainly introduces the usage of the super keyword in Python. The example analyzes the function and related usage skills of the super keyword. If you need it, refer to the example in this article to describe the usage of the super keyword in Python. Share it with you for your reference. The specific analysis is as follows: In the method of a Python cl

1. Subclass constructors If you want to refer to super, you must put super in the first place of the function . 1 classBase {2 Base () {3System.out.println ("Base");4 }5 }6 7 Public classChecketextendsBase {8 Checket () {9 Super();//call the constructor of the parent class, and be sure to put it in the first statement of the methodTenSystem.out.prin

This article original pipi-changingOriginal source of this article: http://www.cnblogs.com/pipi-changing/This document is owned by the author and the blog Park and must be retained without the author's consent.And in the article page obvious location to the original link, otherwise reserves the right to pursue legal responsibility.The difference between this and super in Java ThissuperWhat is This,this is an object of its own, repres

2.2, Python has added a keyword super to solve this problem. The following is an official document description of Python 2.3:Super (type[, Object-or-type])Return the superclass of type. If The second argument is omitted the Super objectReturned is unbound. If The second argument is an object, isinstance (obj, type)Must be true. If The second argument is a type,

About the difference between self and super,The first thing to know about 1 is what self is and what super is. What 2,[Super init] does. 3, why should self = [super init];What is 1,self and what is super?> In dynamic methods, self represents an "object"> In static methods, s

Class A:def __init__ (self):Print "Enter A"Print "Leave A"Class B (A):def __init__ (self):Print "Enter B"a.__init__ (self) # old methodPrint "Leave B">>> B = B ()Enter BEnter ALeave ALeave BThe disadvantage of this is that when the parent class of a subclass changes (such as when the parent class of Class B changes from A to C), the entire class definition must be traversed, replacing all the class names of the unbound methods.Since Python 2.2, Python has added a keyword

Python super I. Problem Discovery and Proposal In the method of a Python class, to call a method of the parent class, before Python 2.2, the usual method is as follows: Code Segment 1: Class:Def _ init _ (self ):Print "enter"Print "leave" Class B ():Def _ init _ (self ):Print "enter B"A. _ init _ (self)Print "leave B" >>> B = B () Enter BEnterLeaveLeave B That is, use non-bound class methods (Methods referenced by class names), and introduce the objec

Python 2.2, Python has added a keyword "super" to solve this problem. The official documentation for python 2.3 is as follows: Super (type [, object-or-type]) Return the superclass of type. If the second argument is omitted the super objectReturned is unbound. If the second argument is an object, isinstance (OBJ, type)Must be true. If the second argument is a ty

the concept of image resolution Image resolution refers to the imaging or display system to the details of the resolution, representing the amount of information stored in the image.The amount of information stored in an image is the number of pixels per inch of the image, and the resolution is measured in PPI (Pixels per inch), usually called pixels per inch.The size of the image is determined by the number of pixels, the resolution is the unit density, the higher the resolution of the same pi

Example Analysis of super keyword usage in Python and python instance analysis This example describes the usage of the super keyword in Python. Share it with you for your reference. The specific analysis is as follows: In the method of a Python class, to call a method of the parent class, before Python 2.2, the usual method is as follows: Code Segment 1: class A:def __init__(self): print "enter A" print "