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First, installation1, the response content is processed by requests, and the Requests.get () method returns a Response objectPIP Install requests2. BeautifulSoup is not only flexible, efficient and very convenient for webpage parsing, but also supports many kinds of parsers.Pip Install Beautifulsoup43, Pymongo is the Python Operation MONGO ToolkitPip Install Pymongo4, installation MONGOSecond, analysis of Web pages source code1, determine the goal: first of all to know which page to crawl which
Original: http://www.csdn.net/article/2012-06-04/2806277Each Java programmer has a Java class ranking table of its own. This ranking table has no strict rules and no rules to follow, it depends entirely on the work of the Java project you are involved in. The following classes, without my introduction, are known to Java programmers because they are very popular in the Java world.1. java.lang.StringNo one can deny that the string class is undisputed ch
As a website optimizer, we face our own website every day to optimize our own website. Only in order to let our website have a higher weight, more traffic. To do this we have to make our site has a large number of visitors, then how to attract people to their own web site, we do site optimization How to make their own site more popular? At this time, each of us to do the site optimizer must face the issue of consideration, only to make the site more p
Label:"How to explain why the database is difficult to expand", the problem comes from Quora, the owner added that he has some basic knowledge of the database, but still do not understand why the expansion of the database is so difficult. Bole Online compiled excerpts of this question and answer post two popular replies.Paul King, Facebook data scientist (3.6K likes)There are four big challenges to scaling a database: Search, concurrency, consistency,
A hot keyword search volume is very high, if a document can be a good combination of popular keywords, then this document brings traffic or other promotional effect is also very ideal, then how to use the popular keywords and SEO skills for document editing, combined with my years of Kunshan website optimization, SEO experience, There are several main techniques: 1. The title of the article needs to appear
As the world's first to realize the next edge to see the technology of the film download and on-demand software, the popularity quickly won the hearts of users, become more and more network insect online watch film and television preferred. Popular use of a very "fool", the user only in the main interface to choose their favorite video can be downloaded or on demand. Found in the use of popular many useful
In the process of doing SEO, see a lot of friends are more and more inclined to long tail keyword, more and more aware of the power of the long tail keyword, I am also so, but this does not mean to do the station need to discard hot keywords. Hot keyword as the main entrance of traffic, still has very important significance. Today, I would like to talk about my experience, the four kinds of advantages of the hot keyword. The main features of the popular
Hello everyone, I am the Grand Internet. In the many communities I have contacted, I feel that the West Shrine and Tianya are the most popular, the West shrine is divided according to different sections, people compare focus points, posted post management more convenient, and the end of the earth is divided into different discussion areas, people more scattered, posted post management is not very convenient. Because our company is doing the network bu
MTA (Mail transfer Agent)-For server administrators, the message transfer agent is the most important tool. The main task of the MTA is to send e-mail messages from one host to another host. The MTA uses SMTP (Simple Mail Transfer Protocol) to deliver e-mail messages. To make it clearer to you, the clients we use to send and receive mail are also using SMTP, but they are not MTA. They are just an application that provides some kind of interface for users to send and receive mail. They are called
running Phoronix Test Suite are not typical users, but more likely to be software and hardware enthusiasts, enterprise service administrators, and other professionals.EXT4 is still the most popular file system used in benchmark testing.Ubuntu is still the most popular Linux distribution in benchmark testing, but CentOS, Arch, Debian and other distributions are doing well. The peaks of other distributions m
OverviewRecently See the Reference Counter section of PHP, first by a variety of Halo, and then by looking at the blog and analysis, summed up a more popular explanation, can help oneself very good memory, but also hope to help you readers. Here is a more orthodox explanation: a reference to PHP variables (http://hilojack.sinaapp.com/?p=1392).SuggestionsThe study of PHP reference counter changes can be learned by installing the xdebug extension, which
The popularity of programming languages, the number of people learning, and the rise of AI have also changed the most popular programming language rankings. Let's take a look.1. PythonPython's history dates back to the 1989 and is popular with its fans for its highly readable code. Many programmers think this is the simplest language to start with.Python is an object-oriented, interpretive computer programm
After the popularity of web Web services, remote calls across gateways are no longer an obstacle, the Internet from simple information publishing-------------Web applications to the Web service, at this time, the role of the browser will be reduced, the current popular software structure C/s and b/a two models, In terms of function, B/s mode has a large number of restrictions, making the maintenance of the program development is very difficult, and th
When it comes to the word hot traffic, I think we will soon think of using hot topics or hot events to obtain short-term high flow, in the SEO this way is generally called interception of traffic, that is, the use of SEO methods to get popular keywords in the short term, so as to obtain short-term hot traffic. For example, there are often some hype topics on the Internet, this will lead to a lot of people on the topic of the relevant keyword search, a
Guide: Although MySQL is one of the most popular programs, many developers think it is necessary to split it into other projects, and each branch project has its own expertise. This demand, along with Oracle's concern about the slow growth of core products, has led to the emergence of many sub-projects and branches of interest to developers. This article will discuss three popular MySQL branches of interest
Transferred from: http://www.oschina.net/question/258230_134502In general, there are two kinds of database things: Reading things (select), modifying Things (Update,insert). When there is no isolation control, multiple things at the same time on the same (the operation of the data may affect the results of the final expected, there are usually four cases(1) Two updates when you modify a piece of data at the same time, it is obvious that this situation is the most serious, in any case, the progra
Popular is a side to look at the software, different from other download tools, download speed to meet your smooth viewing that is normal. Slow download speed: 1. In the popular right corner of the menu "set"-> "option"-> "network Connection", point "global maximum upload speed", Limit upload speed, such as 35K 2. If some network acceleration software is installed, they need to be shut down, such as PP
Through the popular version of the HTML and HTML to introduce the role of the div CSS relationship. What is html:http://www.3lian.com/edu/2011/09-25/10681.html HTML page structure: http://www.3lian.com/edu/2011/09-25/10682.html The above is the basis of the proposal first read the above 2 articles before looking at the following content. HTML Popular definition Pop
to simplify and remove distractions. By removing the options, text, and other elements that clutter the screen, we can make a clean and easy-to-use design. "A messy work space is a description of your brain clutter. ” 4. How to develop an intuitive application design? Source: Eddie lobanovskiy–dribble The first thing you should think about when designing a screen is your target audience. An application designed for people who are completely ignorant of technology usually requ
Increase your chips for the next year! The end of the year, particularly busy at the end, but also do not just work, forget to recharge your own yo, today deliberately share a good article, talk about next year will be popular design trends, I hope to give those who do not forget to enrich their own designers a little valuable reference, After each trend there are related articles to help you understand, do not worry about it. 1. The response contin
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