Bottle is one of the lightest python micro-frameworks for making websites. To handle a form submission, first import the request class from bottle.
from bottle import request
Add allowed request method on the desired route and access the form data. An example is below.
@route('/submit/form', method='POST')
def handle_form_submit():
title = request.forms.get('title')
body = request.forms.get('body')
#handle form data as desired here
redirect('/')
That is all. Check out other bottle tutorials if you are interested.