Web Scrapping / Crawling for an e-commerce website

I need to web crawl e-commerce website to extract the top 100 products in each category and put the results in an excel file. Web Crawling can be done using Python but it need to be executable (exe) file. I will need the source code at the end of the project. The python script need to run in the background without any interruption. It is ok to show a command prompt while the script is running.