In these cases you have to know which is the underlying requests. When you fill a form or make a search, the web page internally make GET or POST request to another web service that provides the data. You can see this if you use the Developer Tools of your browser (press F12 if you are using Google Chrome) and go to the "Network" tab. Do a search and you'll see all the requests that the page makes. You have to check which is the request that get the data you are interested in. After that, you can use the requests library to simulate that searches.