Design and Implementation of Web Crawler System Based on Python

Web crawlers are programs to download resources from internet, one of basic componments of search engines. Using web crawler can collect data in batch es, which greatly improves the speed an d efficiency of data analysis. Python language is simple and efficient, known as "glue language", with rich third-party library, which is very convenient to handle web pages and links. This paper introduces the types of web crawler, working principle and Python crawler technology, and constructs a crawler system for crawling web images.