(This video tutorial is suitable for learners who want to master crawler technology. It is described in the mainstream version of Python 3.7. The content includes: Python foundation, ulllib, parsing (XPath, jsonpath, beautiful), requests, selenium, scrapy framework, etc. For students with zero basic knowledge, you can start from zero. It is recommended that students with Python foundation learn some crawler videos directly from episode 52. The tutorial illustrates the crawling of various websites, including design websites, recruitment websites, book websites, picture material websites, etc. it also explains how to crack the verification code and use the general coding platform.)