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@TOC xpath crawls to university ranking 700 (python3) Reptile thinking There are no more than four steps for a crawler, [find data], [parse data], [extract data], [save data] Find data Data found. Find the website you want to crawl, the content you want to crawl, and the website of this article : http://www.gaosan.com/gaokao/196075.html , ...

unscramble 1. Why is the width of the mobile page rendering 640 or 750? To be honest, of course, but for the sake of specification, 640 or 750 is relatively appropriate. Take the Iphone 5s for example. Its css pixel width is 320px. Because its dpr=2, its physical pixel width is 320 × 2 = 640px, which is why you cut a picture in 5s a ...

1. 9 built-in objects of JSP (used directly without creating) pageContext, page, page Request completes a request and the response object responds Session one session, application the whole server, exception exception exception, out output object, config configuration 2.4 large scope (different scope of storage attributes < scope &gt ...

[HTML for reconstructing the front-end knowledge system] takes you to recall those vague HTML tags introduction In the previous section, it was said that HTML is a markup language, so the most important thing is tags, that is, tags. So many labels? Want to write it all here? Of course not. Common tags will be explained here. (up to 70% in commo ...

backgroundThe defense is broken 😭! Suddenly, I found that the number of fans of SegmentFault platform has exceeded 1000. It is the first of my three blog platforms nuggets, blog Garden and SegmentFault to exceed 1000. So I designed and developed this page to commemorate it. Thank you very much for your attention 🙏， In the future, I will pay ...

1. Getting started with Vue Basics 1.1 scaffold environment installation Vue Installation of scaffold # Install @ vue/cli cnpm i -g @vue/cli 1.2. Create Vue project Create a project folder locally, such as d:\project, run cmd in this directory, and then execute the following command: # Create project vue create myapp # Select the in ...

A small task of the school Mobile Innovation Application Association is to make a virtual game handle with HTML. It looks very fresh, and I'm not very familiar with the front end, so I'll try it. Let's look at the concept map first: (concept map is a concept map after all 😅) It looks troublesome, red, blue, red and blu ...

[HTML for reconstructing the front-end knowledge system] takes you to recall those vague HTML tagsintroductionIn the previous section, it was said that HTML is a markup language, so the most important thing is tags, that is, tags.So many labels? Want to write it all here?Of course not. Common tags will be explained here. (up to 70% in common us ...

preface A simple blog about learning SASS 1, Install SASS SASS is developed based on Ruby language, so we need to use SASS first Install RubyAfter installation, we can install SASS. Open the command line window and enter gem install sassThen test whether it is installed. On the command line, enter sass -v to display the version num ...

📢 Blog home page: 🏀 Bryant typing the code🏀 📢 Welcome to praise 👍 Collection ⭐ Leaving a message. 📝 Welcome to discuss! 👏 📢 This article was originally written by [Bryant who knocked the code], and was first launched in CSDN 🙉🙉🙉 📢 Since the blogger is learning Xiaobai, there will inevitably be mistakes. If you have any questions, ...