(This course mainly introduces crawler related knowledge, including what is a crawler, web page acquisition, regular web page parsing, XPath web page parsing and other related knowledge points. It is tailored for entry-level learners.After learning and mastering, beginners can master the basic knowledge system of reptiles after learning this part. Complete simple crawler tasks. Have a more comprehensive understanding of reptiles and lay a good foundation for further in-depth study of reptiles in the future.)