Hey? Why is my program running and failing? The websocket can't connect after restarting the computer. What the hell is this? The thing is like this, there is a small program (a program with a small project) that runs on a windows server. If it is a server, it can't be regarded as a server, because it is not a 24-hour standby, so let's call it a server for the time being! We made a websocket service, put it in the windows self-start program, and then started the websocket service every time we b
algorithmLeetCode T1095. Find the target value in the mountain arraydescriptionAn array of integers numsin addition to the two figures, other figures appear twice. Please write a program to find these two numbers that only appear once. The required time complexity is O(n), and the space complexity is O(1).This is an interactive question)Give you a mountainArr array, please return the smallest subscript index value that can make mountainArr.get(index) equal to target.If there is no such subscr
Spider classThe Spider class defines how to crawl a certain (or certain) website. Including the crawling action (for example: whether to follow up the link) and how to extract structured data from the content of the web page (crawling item).In other words, Spider is where you define the crawling action and analyze a certain webpage (or some webpages).class scrapy.SpiderIt is the most basic class, and all crawlers written must inherit this class.The main functions and calling sequence are a
Scrapy frameworkIntroduction to Scrapy Scrapy is an application framework written in pure Python for crawling website data and extracting structured data. It has a wide range of uses. With the power of the framework, users only need to customize and develop a few modules to easily implement a crawler to grab web content and various pictures, which is very convenient. Scrapy uses Twisted ['twɪstɪd](its main opponent is Tornado) asynchronous network framework to handle network communication, which
Spider, Anti-Spider, Anti-Anti-Spider, a magnificent battle... Xiao Mo wanted all the movies on a certain station, wrote a standard crawler (based on the HttpClient library), constantly traversed the movie list page of a certain station, analyzed the movie names according to Html and stored them in his database. Xiaoli, the operation and maintenance of this site, found that the number of requests increased sharply during a certain period of time. Analysis of the log found that the user was IP (x
Multi-threaded crawler First review some of the knowledge learned before1. A cpu can only perform one task at a time, and multiple cpus can perform multiple tasks at the same time. 2. A cpu can only execute one process at a time, and other processes are in a non-running state. 3. The execution unit contained in the process is called a thread, a process It can contain multiple threads. 4. The memory space of a process is shared, and threads in each process can use the shared space. 5.
XML and XPATHIt is very troublesome to process HTML documents with regularity. We can first convert HTML files into XML documents, and then use XPath to find HTML nodes or elements.XML stands for Extensible Markup Language (EXtensible Markup Language)XML is a markup language, very similar to HTMLXML is designed to transmit data, not display dataXML tags need to be defined by us.XML is designed to be self-describing.XML is the recommended standard of W3C<?xml version="1.0" encoding="utf-
Handler and OpenerHandler processor and custom OpenerOpener is an instance of urllib2.OpenerDirector. We have been using urlopen before. It is a special opener (that is, we built).But the urlopen() method does not support other advanced HTTP/GTTPS functions such as proxy and cookies. All to support these functions: 1. Use the relevant Handler processor to create a processor object with a specific function; 2. Then use these processor objects through the urllib2.build_opener() method to create a