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#-*-Coding:utf-8-*-# python:2.x__author__ = ' Administrator '#由于5, 6,7,8,9,10,11 is mainly in the package, testing and other studies so this side does not study#优化: general principles and profiling techniquesPrint (U ' premature optimization is the source of all evil in programming-------Donald Knuth ')#1: Priority Three Principles"""Regardless of the outcome, optimization is a cost, and when the code is wo

IntroducedVisual Studio Code (VS CODE/VSC) is a free, open-source, modern, lightweight code editor that supports syntax highlighting for almost all major development languages, smart code completion, custom hotkeys, brace matching, snippets, code diff, GIT, and more. Plug-in extensions are supported and optimized for Web development and cloud application development. Software cross-platform support for Win, Mac, and Linux, so Python programmers are al

Object-oriented programming--object oriented programming, short for OOP, is a programming idea. OOP takes objects as the basic unit of a program, and an object contains functions for data and manipulating data.Process-oriented programming treats a computer program as a set of commands, which is the sequential execution

Object-oriented programming--object oriented programming, short for OOP, is a programming idea. OOP takes objects as the basic unit of a program, and an object contains functions for data and manipulating data.Process-oriented programming treats a computer program as a set of commands, which is the sequential execution

This paper illustrates the data transmission UDP implementation method of Python network programming. Share to everyone for your reference. The specific analysis is as follows: First, the question: Do you think that tools like msn,qq on the Web transmit data mysteriously between machines? You want to play a little bit, too? Do you pass data between the two machines? Today let

This knowledge point refers to Liaoche's Python course [https://www.liaoxuefeng.com] Thanks to the free course of Turing's knowledge in Beijing [http://www.tulingxueyuan.com/]2018/6/26 Tuesday 11:15:57Inheritance and polymorphism Inheritance is a class that can get member properties and member methods in another class Function: Reduce code, increas

This article mainly introduces the Python socket network programming sticky packet problem, and now share to everyone, but also to make a reference. Come and see it together. One, sticky bag problem details 1, only TCP has sticky packet phenomenon, UDP never sticky packet Your program actually does not have the right to operate the network card directly, you operate the network card is through the operati

We all know that concurrent (not parallel) programming currently has four ways, multi-process, multi-threading, asynchronous, and co-routines. Multi-process programming has a C-like os.fork in Python and, of course, a higher-level encapsulated multiprocessing standard library, which provides a similar nginx master pro

://starship.python.net /~ Skippy/win32/Downloads.html The Python Win32 enhancement tool allows Python to call the WIN32COM interface. the emergence of this tool makes Python extremely powerful. Speech. py http://pypi.python.org/pypi/speech/ This is a very streamlined encapsulation module. it is optional here. of course

Summary of the usage of the urllib2 module in Python network programming, pythonurllib2 I. Basic Applications import urllib2url = r'http://www.baidu.com'html = urllib2.urlopen(url).read()print html The client communicates with the server through request and response. The client first sends a request to the server and then receives the response returned by the server. Urllib2 provides a request class that al

','Jxz') My.exsql ('select * from Stu;')Print('I am the last line of code')In the constructor, make the database connection, do the exception processing, execute the SQL statement in the executing SQL statement function, the operation of the destructor closes the cursor and the database connection.In connection with the database, there is a new knowledge point: autocommit=true auto-commit, which was not mentioned in the previous database connection use, instead of the need to determine whether t

relatively stable. Win32com http://starship.python.net/~skippy/win32/Downloads.html Python Win32 enhancements enable Python to invoke the Win32com interface, which makes Python incredibly powerful speech.py http://pypi.python.org/pypi/speech/ This is a very streamlined packaging module, here is optional, of course

Python network programming-epoll of IO multiplexing What is epoll? What is epoll? In linux network programming, select is used for event triggering for a long time. In the new linux kernel, there is a mechanism to replace it, that is, epoll. Of course, this is not only available in the 2.6 kernel. it is introduced in t

object through the left and right nodes using t4 = t3.right. right. subtree () print t4 # The Left tree of t3 is actually the leaf object t5 = t3.left. subtree () print t5 Responsibility chain modelFor example, when we are still studying, the scores for the exam are several grades, for example, 90-points and 80-90 points. well, I 'd like to provide a feedback to print your score based on the score, for example, 90-100 is A +, 80-90 is A, and 70-80 is B +... Of

Object-Oriented programming (Object oriented programming), or OOP, is a programming idea. OOP takes objects as the basic unit of a program, and an object contains functions for data and manipulating data .process-oriented programming treats a computer program as a set of commands, which is the sequential execution of

'... connected from:', addr whileTrue:data=tcpclisock.recv (bufsiz) #用于接收从客户端发来的数据 parameter represents the maximum amount of data accepted at one time, here is 1kif notData: BreakTcpclisock.send ('[%s]%s'%(CTime (), data) # Send timestamp as content to client Tcpclisock.close () Tcpsersock.close ()At runtime, you can see that the server is running and waiting for a client to connect, so at this point we need to use the client to connect to the server.To write a simple client-side program: fro

Have you ever wondered what the design pattern is? With this article you can see why design patterns are so important, and some examples of Python show why design patterns are needed and how to use them. What is the design pattern? Design patterns are summarized, optimized, and reusable solutions to some of the programming problems we often encounter. A design pattern is not like a class or a library tha

You may be familiar with url-based HTTP requests and other operations using the urllib2 module. here, we will take a closer look at urllib2's HTTP exception handling functions, let's take a look at the usage summary of the urllib2 module in Python network programming: I. basic applications import urllib2url = r'http://www.baidu.com'html = urllib2.urlopen(url).read()print html The client communicates with

Tornado Tornado is a non-blocking extensible Web server and Python Web framework written using Python, You can use Tornado to write web programs without relying on any Web server to provide efficient Web services directly. So tornado is more than just a web framework and an efficient Web server that can be used in a production environment. Torando uses efficient asynchronous I/O models Epoll and Kqueue on

://starship.python.net/~skippy/win32/Downloads.html The Python Win32 enhancement tool enables Python to invoke the Win32com interface, which makes Python incredibly powerful speech.py http://pypi.python.org/pypi/speech/ This is a very thin package module, here is optional, of course, I do not recommend repeating the wh