Python: Crawl daily epidemic data

Preface At present, every major platform, such as Tencent and today's headlines, will update the daily epidemic data, and their data sources are the same, mainly through the health care commission's official network. Taking the whole country, Hubei and Shanghai as examples, there are three websites: T ...

Posted on Sun, 02 Feb 2020 18:41:32 -0800 by maxat

An analysis of open daylight in SDN learning

In the previous article, we talked about the basic understanding and installation of ODL. In this article, we mainly talked about the internal use of ODL. The ODL controller is MD-SAL mechanism, and MD represents the service driven by model. This model is simply Yang model. As early as 2003, IETF est ...

Posted on Sun, 02 Feb 2020 05:27:29 -0800 by ReeceSayer

Java composite data type

1. Java string In Java, strings are treated as objects of type String. The String class is located in the java.lang package, which is imported automatically by default. The String object will not be modified after creation. When we modify a String object, we actually point the original reference to ...

Posted on Fri, 31 Jan 2020 22:09:00 -0800 by Servyces

phpstudy Project Actual Warfare - Message Board (Detailed)

follow PHP Chinese Network Learn to make message boards... Previously, I blogged on csdn about a simple operation of phpstudy. Click here to enter During the epidemic, we have to pick up what we missed at home. Next, I will add more to what we haven't written before. 5. Creation of PHP Display Lis ...

Posted on Fri, 31 Jan 2020 20:28:08 -0800 by saito

Python 3 uses selenium + Chrome basic operation code

selenium is a third-party library of Python, which needs to be installed before use. But if you use anaconda, you can omit this step. Why? Bring your own, willful. Installation command: pip install selenium (1) Use selenium to open the specified website. Take Taobao for example. # -*- coding: utf-8 -*-"""Created on Wed Jul 25 10:12:39 2018@a ...

Posted on Fri, 31 Jan 2020 15:20:15 -0800 by Lerris

js and ajax implement scrolling to the bottom to automatically load data instances

1, Function description Scrolling down to the bottom of the page to load data is the practice of many waterfall websites. This example is fixed data, which is used to summarize and record small dishes. Experts should not spray. First, you need to determine how the page scrolls to the bottom, that is, whether the height of scr ...

Posted on Fri, 31 Jan 2020 08:12:01 -0800 by phpfre@k*

I heard that people who want to be hackers have played the Monyer game (1-14 introduction)

Zero passEnter the portal to start the zeroth close (game link) Please click the link to go to the first level: the connection is on the left → ← the connection is on the right I can't see it.... (I can only see the names of a bunch of big guys, and I can also see the vegetable chicken. I'm i ...

Posted on Fri, 31 Jan 2020 06:09:15 -0800 by devangel

P1251 napkin planning problem in Luogu (minimum cost and maximum flow)

meaning of the title A restaurant needs $r_i $napkins on the $I $day. There are three ways to get napkins every day 1. Buy for $p $ 2. Send it to the express department for $f $and take it out in $m $days 3. Send it to the slow cleaning department for $s $, and take it out after $n $ Ask the minimum cost when meeting the requirements Sol ...

Posted on Fri, 31 Jan 2020 03:09:44 -0800 by synapp2

Nginx web services (basic theory, operation, access control, nginx virtual host)

Article directory Preface: 1, Nginx service foundation 1.1 overview of nginx 1.2 manual compilation and installation of Nginx 1.3 operation control 2, Nginx access control 2.1 profile introduction 2.2 access status statistics 3, Access control 3.1 install and configure DNS Service 3.2 test DNS r ...

Posted on Thu, 30 Jan 2020 22:43:40 -0800 by chevys

OKHttpUtils of Android framework

OKHttpUtils is a encapsulation class of OKHttp. OKHttp has many functions, such as file upload and download, text data request get and submit post, Download picture, etc   Three jar packages need to be imported: okhttp-3.4.1.jar, okhttputils-2 ﹣ 6 ﹣ 2.jar, and okio-1.9.0.jar. I have collected them. Here is the download addr ...

Posted on Thu, 30 Jan 2020 08:01:42 -0800 by show8bbs