Begginer Question , what i need for web app and site

[meiry242 at gmail.com]

Hello all
coming from java and c++ now going with python 
what setup do i need to run full python stack for web application .
what i need is web framework and back-end . 
what usually be in the java world tomcat and servlets or jsp and pure java backend for processing data .
what will be the Equivalent in python world ?
Thanks!