Python

First, today's main content:Module: A py file is a moduleDivided into three categories: 1, built-in modules: Login module, TIME module, SYS module, OS module, etc. are built-in modules2, Expansion module: Third-party modules that need to be

Reference: http://www.cnblogs.com/Eva-J/articles/8324673.htmlintroduction of co-processCo-process: is a single-threaded concurrency, also known as micro-threading, fiber. English name Coroutine. One sentence describes what a thread is: The process

Python's generative style can write very elegant code when some types convert to each other. If the list is converted to another list, dictionary, or tuple. and the execution of code is more efficient than using for...in ... High

in the figure Browse is a browser, Webservera is a trusted website/attacked site A,webserverb is a malicious website/click on site B.(1) a user opens a browser, accesses a trusted website a, enters a user name and password to log on to website a.(2)

A = is an assignment, two = = is a comparison3. Content encoding　　　　What is the leftmost one of ASCII: 0 (ASCII with 8 bits represents a byte, the last 7 bits are sufficient to represent, so the leftmost one is currently 0)　 8 bit

1. There are three ways to add1 #"", "" Three Ways2 3 #Append ()4Li = ['python','Java','C + +']5Li.append (['these are all programming languages .'])6 Print(LI)#output results: [' python ', ' Java ', ' C + + ', [' These are programming languages ']]7

For a very detailed log use please see here: http://www.cnblogs.com/dkblog/archive/2011/08/26/2155018.html1 #Import Log Module2 ImportLogging3 #you need to import this module when setting up a log with a configuration file4 ImportLogging.config5

Python has a plugin that allows us to implement features similar to Linux under Tailf, grep, and awk on a Web page. The name of this plugin is Tailon.Install plug-ins,Pip Install TailonStart the

The problems that arise are:Wrote a. Py program based on the output HelloWorld of the flask Framework, which was written on the Aliyun server, based on the Ubuntu operating system.The code is written like this:However, when the browser is accessed,

Now continue to learn how to use celery in an integrated framework.Using celery in flaskIntegrating celery in flask requires two points: The name of the instance object that created the celery must be the name of the Flask application app,

#!/usr/bin/env python#-*-coding:utf-8-*-__author__="Loki"#Usage:make a Diy Calculator#Example:#' 1-2 * ((60-30 + ( -40/5) * (9-2*5/3+7/3*99/4*2998+10*568/14))-( -4*3)/(16-3*2)) 'ImportRere_rule='\([^()]+\)'defarithmetical (temp): Result=eval

Control structure If statement#Only if blockifCondition:if_true_block#If_else BlockifCondition:if_true_blockElse: If_false_block#If_elif_else BlockifCondition:if_true_blockelifCondition:elif_true_blockelifCondition:elif_true_blockElse:

class Person (object): Count = 0 #类属性 def __init__ (self,name,age): #实例属性 # Self.__name = Name#name is a private property; The private property receive is the Set/get method; # self.__name can also be used with Self.setname (name)

Original addressOriginal Address 2Several implementations of the singleton pattern in Python and its optimizationReading directory (content)Single-Case modeSeveral ways to implement a singleton pattern1. Using the module2. Using adorners3. Using the

Object-oriented:According to what exists in reality, it simulates its characteristics and is used to describe a particular object.1. Using functions to accomplish object-oriented　　1 defSchool (NAME,ADDR):#School has a name and address2 defdict_ (

Recently discovered that there are multiple Python environments on the servers in the cluster, there are multiple versions of the same python, the main difference being that the modules installed in the site-packages are different, so the benefits

Configparser module:is the module used by the Python standard library to parse the configuration file.Format:Section: Using [] to mark section names: or =: using: or = Assignment[Websv]ip: ' 192.168.1.10 ' port:443name = ' root ' pw = ' root1990 '

# WebSocket Implementation principle ' 1. The server opens the socket, listens on the IP and Port 2. Client sends connection request (with IP and port) 3. Server-side allow connection 4. The client generates a random string, and the magic string is

Python is not well-known for performance, but mastering some skills can also maximize program performance and avoid unnecessary waste of resources.1. Using Local variablesTry to use local variables instead of global variables: Ease of maintenance,

define function def>>> def myfirstfunction ():Print (' first function ')>>> myfirstfunction ()First functionParameters of the function>>> def mysecondfunction (name):Print (name + ' IloveYou ')>>> mysecondfunction (' WC ')Wciloveyou>>> def Add (num1,