Python

InstallationUse the PIP command to install the Redis-operation library.Pip Install RedisOperationImport RedisOperating the Redis database in Python is straightforward, and commands are almost identical to the commands for working with the Redis

Dynamically creating classesFormat:Type (class name, a tuple of the parent class (which can be empty for inheritance), contains the dictionary value of the property)Type creates a case for the class:Test01 = Type (' Test01 ', (), {})Print

Using crawlers to access the site, you need to hide their identities as much as possible, in case of being blocked by the server, in the work of the project, we have 2 ways to achieve this goal, are delayed access and dynamic agents, and then we

__DICT__: Properties of the Class (contains a dictionary, consisting of the data properties of the Class)__DOC__: Document string for Class__NAME__: Class name__MODULE__: The module where the class definition resides (the full name of the class is '

The earliest encoding in the world was that ASCII had only 256 bit 8 bits, but only 128 bits were left with a complement of 0. It was invented by the Americans. Only support English numerals and symbols one letter is 8bit=1byteWith the universal

I. WedgeYou want to pass a data between two programs, you need to use network communication.Two. Architecture of software development:The first kind: Application class: QQ,, network disk, Youku This category belongs to the desktop application that

Reference post: http://www.cnblogs.com/jingmoxukong/p/4302891.htmlQuick Sort is an exchange sort .Quick Sort by C. A. R. Hoare was introduced in 1962.The basic idea is to divide the sorted data into two separate parts: the left side of the split

#!/usr/bin/env pythonImportSys, timeImportParamiko,datetime,oshostname=''username='Root'Password=''Port=22defupload (Local_dir, Remote_dir, special_names):Try: T=Paramiko. Transport ((hostname, port)) T.connect (username=username,password=password)

ImportLoggingdeflogger (): Logger= Logging.getlogger ('Logger') #括号里面默认是root Logger.setlevel ('DEBUG') #设置等级是DEBUG, the number is 10,info is 20,warning is 30,error is 40,criticle is the _format= Logging. Formatter ('[% (name) s]% (asctime) s%

#!/usr/bin/env Python can declare the Python interpreter used by Liunx (unique)Coding#-*-Coding:utf-8-*-Python2 have Chinese language to add the code in the header file Plus, Python3 do not use, the default is Utf-8 (also can be written UTF8)Python

At the end of automated testing, we often need to send test results to team members via email. How does the Python language implement automatic mail delivery? Please see:Way One:The SMTP (Simple Mail Transfer Protocol) is simply the message Transfer

I. Installation steps1. Check the system pythonCentOS 6.8 comes with Python 2.6.6,yum, the newest and Python 2.6.6, and can only download Python 2.7.12 's source code to compile and install itself. Such as: Installing development

1. function is a programming method of logical structure and processThe function definition in Python uses the keyword def to definedef test (x):"The function Definitions"X+=1return xdef: A keyword that defines a functionTest: Function Name():

1) min (2,4) # # to find the minimum value2) Max (2,4) # # to find the maximum value3) sum (range (1,100,2)) # # sum4) Enumeration: Returns the index value and the corresponding value valuefor I, V in enumerate (' Hello World '):Print str (i) + V #

This article mainly introduces the detailed operation method of list in Python, including create, access, update, delete, other operation, etc., the friend who need can refer to.1. Create a list. Just enclose the comma-separated data items in square

Original code:dir='drama\\['+str (drama_dic['author']) +'[ '+str (drama_dic['alias') +']' if not os.path.exists (sys.path[0]+os.path.sep+dir): print(sys.path[0]+ os.path.sep+dir) Os.mkdir (sys.path[0]+os.path.sep+dir)Error 3 indicates that

Basic operations for tuples: Gets the number of elements: Len () Connect two tuples: Tuple 1 + tuple 2 Copy multiple tuples: tuples * Number of copies Get a single element: tuple [index position] Get multiple elements:

#四个步骤1. View crawl content source format Crawl content can be URL (link), text, picture, video2. Request Web source (may be set) agent, speed limit, cookie3. Match with regular expression4. Save data file operations#两个基本工具

1p18.python the standard library location (typically the location of string.py, or you can find it whereis python)C:\Python27\Lib/usr/lib64/python2.6Third-party library location (typically site-packages location)C:\Python27\Lib\site-packages/usr/lib/

First, the function introductionFunctions are code that implements a particular function, which improves the reusability of the code; The function must be called before execution; a function that only does one thingSecond, define the function: With