Python

Installing Tornado Easy to use Grequests library directly, the following is the tornado of the asynchronous client. Asynchronously used the tornado, based on an example of an official document, to get a simple asynchronous crawler. You can refer to

If you call the Read () method directly on a large file object, it causes unpredictable memory consumption. A good approach is to use fixed-length buffers to continuously read the contents of the file. That is through yield. When using Python to

The example of this article for you to share the Python multi-process shared variables related code for your reference, the specific content is as follows From multiprocessing import Process, Managerimport Osimport time Class Mulfun (): Def __init__

Brief introduction: Take a look at some of the installation steps for the Python environment package 1. Upgrade Python to 2.7.10 (default 2.6.6) Shell > Yum-y Install epel-releaseshell > yum-y install gcc wget readline-devel zlib-devel

This example describes the use of enumerate function traversal elements in Python. Share to everyone for your reference, as follows: The enumerate function iterates through the elements in the sequence and their subscripts The sample code is as

Word Practice Class: Tell Python to create something new Object: Two meaning: The most basic thing and any instantiation of something. Instance: Create a class to get something. def: Create a function in the class. Self: Used in

The examples in this paper describe the method of translating the Python implementation list into a dictionary data structure. Share to everyone for your reference, as follows: ' [{' symbol ': 101, ' sort ': 1, ' name ': ' AAAA '}, {' symbol ': 102,

Call Function: #!/usr/bin/env Python3 #-*-coding:utf-8-*- # function call >>> abs (+) >>> abs ( -110) >>> ; ABS (12.34) 12.34 >>> ABS (1, 2) Traceback (most recent call last): File " ", line 1, in C7/>typeerror:abs ()

Mechanize is the replacement of some of the functions of the URLLIB2, which can better simulate the browser behavior and be more comprehensive in Web Access control. Combined with BeautifulSoup and re modules, you can parse Web pages effectively,

The example of this article for everyone to share a simple Python login verification, for your reference, the specific content as follows Writing the Login interface Requirements: 1, enter the user name password 2. Display welcome information after

Responsibility Chain Model Chain of Responsibility Mode: the object that can handle the request is linked to a chain, and the request is passed along this chain until there is an object processing the request, avoiding the coupling between the

Redirecting a socket stream to a standard input or output stream #!/usr/bin/env python3 "" "Test Socket-stream redirect Mode" "Import sys,os,timefrom multiprocessing import processfrom socket Import * def initlistenersocket (port=50008,host=

One: threading VS Thread As we all know, Python is to support multi-threaded, and is a native thread, where threading is the thread module has been packaged, can be used more, threading module inside the main to some of the thread Operation object,

List The list is the most flexible, ordered collection object type in Python. Unlike strings, a list can contain objects of any type: numbers, strings, or even other lists. A list is a mutable object that supports actions that are modified in situ.

Always wanted to be able to help me filter out high-quality articles and blog platform to it took a name Moven. The process of implementing it is divided into three stages: 1. Downloader: Download for the specified URL and pass the obtained content

Generate random passwords It's quite handy to do this with Python, and the graceful string method plus choice is absolutely perfect. make_password.py # # #简单几行代码执行即可生成记不住的字符串 ###$ python make_passwd.py dlrw9eit qs4wm84q rqwl4l2l u9g0lgww jhptydyu .

Because: Django processing static files is not very friendly;Requests for PHP or other resources may need to be processed in the future; So consider the combination of Nginx, using NIGNX to do its good route distribution function, while doing

Hello everyone, the previous introduction has said so many basic knowledge, the following we do a few practical projects to challenge it. So here's an example of a little joke that Python crawled into the embarrassing encyclopedia. First of all,

lxml is the most abundant and easy-to-use library for XML and HTML-related features in Python. lxml is not a python-brought package, but a python binding for the LIBXML2 and LIBXSLT libraries. The difference is that it takes into account the speed

In addition to using Django built-in forms, sometimes we often need to customize the form. Submitting a custom form post often leads to errors caused by CSRF (cross-site request forgery) "CSRF verification failed. Request aborted. " This article