Look At This
https://sgp1.vultrobjects.com/ETL-Processes/Web-Scraping-Services/web-scraping/4-internet-creeping-versions-web-scratching-with-python60299.html
However, there are many tools on the market and it's very easy to get puzzled. You can use it for price surveillance if you enjoy an eCommerce organization. Scuffing public data that is not copyrighted for non-commercial