Flask:

Python Webapp Framework

Tutorials

The Official Tutorial: http://flask.pocoo.org/docs/1.0/tutorial/#tutorial
Python Web Applications With Flask (from RealPython.com):
- Part 1 Application Setup
- Part 2 Users, Templates, Static Files
- Part 3 Testing, Mocks, Integration Tests, Debugging, Error Handling, Logging.
Flask By Example (from RealPython.com):
- Part 1 Project Setup
- Part 2 Postgres, SQLAlchemy, Alembic
- Part 3 Text Processing with Requests, Beautiful Soup, NTLK (Natural Language Toolkit)
  - If you need to do web scraping, or Natural Language Processing, look here.
- Part 4 Implementing a Redis Task Queue
  - For background processing of things that take longer than a single web request/response should take
- Part 5 Integrating Flask and AngularJS
- Part 6 Updating the Staging Environment
  - Details of getting Flask and Redis to play nice with Heroku
- Part 7 Updating the UI
- Part 8 Custom Angular Directive with D3
  - D3 is a JavaScript library for “data driven documents”—it provides advanced data visualization capabilities.

“The Ultimate Flask Front End”
- Part 1: Incorporating React and Bower
- Part 2: React, Gulp and Tasks

Building and Documenting Python REST APIs With Flask and Connexion
- https://realpython.com/flask-connexion-rest-api/