(This set of courses is a complete version of the web crawling course. Students can learn the relevant knowledge of web crawlers through this course, so as to learn all aspects of web crawlers, and be competent for web crawler-related work after learning. 1. The system is complete and scientific, which is convenient for systematic learning; 2. The courses are easy to understand, allowing students to learn something; 3. From zero foundation to in-depth teaching, even zero foundation can be learned.)