What is a framework?
As a programmer, you don’t need to start from scratch when you have tools designed to help you with your projects. Frameworks are software that is developed and used by developers to build applications.

Using a software framework to develop applications lets you focus on the high-level functionality of the application. This is because any low-level functionality is taken care of by the framework itself.

this application give you a very simple introduction to start with python and javascript framework :

1) Djang
2) Flask
3) Tornado
4) React js
6) Vue js
7) Angular js