Managing parameters of URL (Python Flask)

I want some search feature in my website. In the output page, I am getting all the results in single page. However, I want to distribute it to many pages (i.e. 100 searches/page). For that, I am passing a number of default searches in "urlfor" but it isn't working. I know I am making a small error but I am not catching it. Here is my code below: @app.route('/', methods=['GET', 'POST']) def doSearc