python programming course udemy

(self): print (' Dog eatting ') def bark (self): print (' Dog Bark ') Dog=dog () Cat=cat () cat.eat () def eat (obj): Obj.bark () Eat (CAT)　　Duck typePython advocates duck type, that is, ' if it looks like, sounds like and walks like a duck, then it's a duck 'Python programmers usually write programs based on this behavior. For example, if you want to write a custom version of an existing object, you can inherit the objectYou can

Mainly to find work, get started quickly, heard the Peking University Jade Bird and so on training institutions Reply content:1, if there is no interest in the IT industry, what institutions are not. 2, if not work hard, they applying, only look at the programmer pay high, yearning for it, encountered difficulties on the retreat. 3, high school education, English, academic qualifications are flawed, but as long as there is interest and effort are not problems. Tell a story: A lad graduated from

PHP, Java, Python, C, C + + These programming languages have what characteristics or advantagesAssembly:C:Java:C#:Php:Python:Go:Haskell:Lisp:C++: amp;lt;img src= "https://pic3.zhimg.com/3345a2825f1f983cb49fb2ea67ccfa56_b.jpg" data-rawwidth= "300" data-rawheight= "class=" Content_image "width=" amp;gt; Java Like Kenji Miyazawa's "Defying Wind and Rain" in the appearance of the c

Urllib and URLLIB2 modulesThe most powerful of the various network workspaces available are urllib and URLLIB2. They allow access to files over the network, just as those files exist on your computer. With a simple function call, it is possible to use almost anything that the URL points to as input to the program.The two modules have the same function, but the URLLIB2 is a little better. Urllib2 is a good choice if you need to use HTTP authentication or cookies, or if you want to write extensio

received data type is bytes, it is converted to a string and then printed -INP = input ('>>>') -Conn.send (Bytes (INP,'UTF8'))#the data type to be transferred should be bytes - -Sk.close ()4. Create a clientIt is much simpler to build a client-side program than to set up a server with a socket. Of course, you need to create an instance of the socket, and then tune the socket instance's connect () method to connect to the server side. The prototype f

style. * A function-based language built on C language like python provides the ability to write loop code. Although built-in functions provide function-based programming interfaces, but it is usually implemented in a loop. Similarly, if you find that built-in functions cannot meet your cycle needs, you may also encapsulate them and provide an interface. Return Value Returning a function usually needs to

Use the Mixin design mode for Python programming, mixinpython The Mixin mode is a frequently used mode in python. appropriate and reasonable applications can achieve the purpose of reusing code and rationally organizing the code structure. Python's Mixin mode can be implemented through multi-inheritance. For example, we can customize a simple data container with

properties in the instance, it will look up along the inheritance chain. If it is a method, it invokes the nearest method, and if it is a property, it is bound to an attribute on the instance.(3) The polymorphic concept is consistent, any place that can reference the parent class, must be able to use the subclass4. Get related properties after defining class objects(1) type (obj) return variable(2) dir (obj) returns all properties of the variable(3) GetAttr (Obj,attrname) Get Properties: Attrna

=[] forIincharray:iffunc (i): Ret.append (i)returnretPrint(Filter_test (tell_sb,movie_people))#function filter to return an iterative objectPrint(Filter (LambdaX:x.startswith ('SB') , movie_people)) filter functionFilter Function#of course, map,filter,reduce, you can handle all data types.Name_dic=[ {'name':'Alex',' Age': 1000}, {'name':'Wupeiqi',' Age': 10000}, {'name':'Yuanhao',' Age': 9000}, {'name':'Linhaifeng',' Age': 18},]#filter

server socket is heard or received a connection request from the client socket, it responds to the client socket request, establishes a new thread, sends a description of the server socket to the client, once the client confirms, the connection is good. Service-side socket base is in listening state(3) Socket two modesThere are two ways to operate a socket: connection-oriented and non-connected. A connection-oriented socket operation is like a phone that must establish a connection and a call,

. When a global variable has the same name as a local variable, the local variable functions within the function that defines the local variable, and in other places the global variable works. ScopeProgram design concept, usually, the name used in a program code is not always valid/available, but the name of the availability of the generation? The scope of this name is the range of the code.Five. Nesting functionsFunctions are defined in the body of another function, called nested funct

The usage of the namedtuple class in Python programming, pythonnamedtuple The Collections module of Python provides a lot of useful data container types, one of which is namedtuple. Namedtuple can be used to create a data type similar to the ancestor. In addition to being able to access data using indexes, namedtuple can be used for iteration and data access thro

Tornado Tornado is a non-blocking, extensible Web server and Python Web framework written using Python. You can use Tornado to write Web programs that do not rely on any Web server to directly provide efficient Web services. So tornado is not just a web framework but also an efficient Web server for production environments Torando uses efficient asynchronous I/O models Epoll and kqueue for efficient Web se

the work: functions are written separately and registered as event observers:This approach from the MFC framework of Microsoft Corporation (http://en.wikipedia.org/wiki/microsoft_foundation_class_library)Is present in all GUI development tools (such as Delphi).But the code can also generate events, for example, in a document stored in a database application, the code might provideDocumentcreated,docmentmodified and Documentdeleted3 EventsA new document-specific feature can register itself as an

Python/socket programming of sticky bagSticky Bag:Only TCP has a urine packet phenomenon, UDP will never sticky packets.First you need to master a socket to send and receive messagesthe principleThe sender can be 1k,1k send data and the receiving end of the application can 2k,2k extract data, of course, it may be 3k or more K extract data, that is, the applicatio

Python-based socket Programming (III)What can be achieved with socket-based communication implemented earlier? In the TCP protocol communication is a user said a sentence, the service side to you back, you give the service side to say, the service side to give you back a sentence, so always friendly play down. And so on, another user came, he also want to and the service side of the exchange, so he sent a m

The super keyword can be used when a Python subclass calls a parent class member. during initialization, pay attention to the differences between super () and _ init, next we will go into the usage of the super keyword in Python Programming: there are not many definitions about super in the official document, the general meaning is to return a proxy object so tha

S12-20160227-day07Pytho Automation Development day07date:2016.02.27 @南非波波Course Outline:Day06Http://www.cnblogs.com/alex3714/articles/5188179.htmlDay07Http://www.cnblogs.com/alex3714/articles/5213184.htmlI. Polymorphism and inheritance of classesPolymorphism of the class: Unified interface Invocation#!/usr/bin/env python# -*- coding:utf-8 -*-class Animal: def __init__(self, name): # Constructor of

difference between routers and switches? What is domain name resolution? How to modify the local hosts file? What are the application scenarios and advantages of producer consumer models? What is a CDN? What is LVS and what is the role? What is the role of Nginx? What is the role of keepalived? What is the role of Haproxy? What is load balancing? What is RPC and application scenarios? The function and application of the Asynio module are briefly described . The function and application of the

established. While the server-side socket continues to be in the listening state , it continues to receive connection requests from other client sockets. One of the basic components in network programming is the socket (socket). Sockets are mainly "information channels" between two programs. Programs may be distributed across different computers (over a network connection), sending information to each other through sockets. Most of the network