How i post data on search-Bar website using python script?

As all we know in web application we have get method and post data method. Here my problem appear with post data. For example i want to make my python code that access for search bar of website by insert same values and submit (the website button), then check for the page. How the code gonna be then if there any documentation about this python concepts! I am totally confused Note : i am just beginner in python.