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Python study notes, I recently read the Python tutorial, so I will record some of it. If I read it myself later, the review will be faster.   Print ("I am ***", "What about you? ", True) # Replace the comma with a space and splice it with name =

Python Object-Oriented Programming inheritance and polymorphism explanation, python Object-Oriented Programming This article describes the inheritance and Polymorphism of Python object-oriented programming. We will share this with you for your

Python @ propertyWhen reading Liao Xuefeng's Python notes, I read the @ property feature and found that it is slightly insufficient. Because I am a beginner, I hope to benefit more beginners. @ Property: What is the purpose? The following is a

Python Socket programming details, pythonsocket When using Python for socket programming, you need to use the blocking (default) method to read data streams. At this time, you need to process the data at the end of each time, which is too

After figuring out the fundamentals of convolutional Neural Networks (CNN), in this post we will discuss the algorithm implementation techniques based on Theano. We will also use mnist handwritten numeral recognition as an example to create a

Previous code uses yield directly at the function level, but how to use yield after encapsulating class is rarely encountered.After a half-day study, I finally finished the example. The code has no special place, just as a work item.Working with the

Python black magic @ property annotator usage tips, python @ property @ What is the use of property? On the surface, a method is accessed using attributes.The Code is the clearest. class Circle(object): def __init__(self, radius): self.radius =

A deep understanding of the operating principles of various methods in Python, and a deep understanding of python How does the method work in Python? A method is a function that exists as a class attribute. You can declare and access a function in

I. What is reflection?Reflection, also known as introspection, refers to the ability of the program itself to access, detect, and modify "itself", state or behavior.Two. How does python embody this reflection mechanism?Using strings to manipulate

The meaning of reflection: Gets the memory address of a method of a class through a string, and calls the method.Format: If hasattr(self, ' anattr ')Func = getattr(self, ' anattr ') #获取内存地址Func () # calls the method, equivalent to Anattr () setattr(

__str__class Student (object): def __init__ (self, name): = name def__str__(self): return' Student Object (name:%s)' % self.name __repr__ = __str__#作用: Internal information can be printed directlyPrint (Student ('Michael'))

# __str__ () Class Dog (object): def __init__ (self,name): Self.name = Name def __str__ (self): Return ' Dog object (%s) '% Self.name Print Dog (' Papa ') # # Dog Object (Papa) This is the result of the separate

Copy Code code as follows: #coding: Utf-8 Import Urllib.request Import Xml.dom.minidom Import Sqlite3 Import threading Import time Class Logger (object): def log (self,*msg): For I in msg: Print (i) Log = Logger () Log.log ('

GetAttr The ' getattr ' function belongs to the built-in function, and can be obtained by using the function name Copy Code code as follows: Value = Obj.attribute Value = GetAttr (obj, "attribute") Use ' getattr ' to

How to construct a class from the basic cognition class to the attribute, method, access control, inheritance and restriction of the deep cognition class. 1. Class construction and initialization We define a class and generate an initialization _ _

Rethinking This assignment I am the object-oriented programming, therefore did not consider very comprehensively, causes the programming process to appear a series of coding error, function variable name repetition and so on, this object-oriented

Main 5 parts: main function, URL Manager, Web page downloader, Web page renderer, Web parser (set is used, but the following code does not highlight the advantages of set.) Follow-up can be improved) Main entry function, Spider_main: Import

Design and implement a data structure for Least frequently Used (LFU) cache. It should support the following operations: get and put .get(key)-Get The value ('ll always be positive) of the key if the key exists in the cache, otherwise

In this paper, we mainly introduce the encapsulation, inheritance and polymorphism of Python object-oriented programming by several examples.Encapsulation ofLet's take a look at the example above, use the Student class to create an object, and

Classis an object-oriented vectordefinition of the class:class A (object): pass 全局变量 函数1。。。 def....(self): 函数2.。。。 def....():There are many functions in the class, the first parameter of the function