illinoisvur.blogg.se - Flask app builder run after changing

Column ( JSON ) def _init_ ( self, url, result_all, result_no_stop_words ): self. Column ( JSON ) result_no_stop_words = db. Model ): _tablename_ = 'results' id = db. Once you have Postgres installed and running, create a database called wordcount_dev to use as our local development database:įrom app import db from import JSON class Result ( db. If you don’t have Postgres installed, Postgres.app is an easy way to get up and running for Mac OS X users. Since Heroku uses Postgres, it will be good for us to develop locally on the same database. To get started, install Postgres on your local computer, if you don’t have it already.

Flask-Migrate ( 2.5.2) - extension that supports SQLAlchemy database migrations via Alembic.

Flask-SQLAlchemy ( 2.4.1) - Flask extension that provides SQLAlchemy support.

Psycopg2 ( 2.8.4) - a Python adapter for Postgres.

Part Eight: Create a custom Angular Directive to display a frequency distribution chart using JavaScript and D3.

Part Seven: Update the front-end to make it more user-friendly.

Part Six: Push to the staging server on Heroku - setting up Redis and detailing how to run two processes (web and worker) on a single Dyno.

Part Five: Set up Angular on the front-end to continuously poll the back-end to see if the request is done processing.

Part Four: Implement a Redis task queue to handle the text processing.

Part Three: Add in the back-end logic to scrape and then process the word counts from a webpage using the requests, BeautifulSoup, and Natural Language Toolkit (NLTK) libraries.

Part Two: Set up a PostgreSQL database along with SQLAlchemy and Alembic to handle migrations.Part One: Set up a local development environment and then deploy both a staging and a production environment on Heroku.Remember: Here’s what we’re building - A Flask app that calculates word-frequency pairs based on the text from a given URL. : Upgraded to Python version 3.5.1 as well as the latest versions of Psycopg2, Flask-SQLAlchemy, and Flask-Migrate.Explicitly install and use Flask-Script due to change of Flask-Migrate internal interface. : Upgraded to Python version 3.8.1 as well as the latest versions of Psycopg2, Flask-SQLAlchemy, and Flask-Migrate.Free Bonus: Click here to get access to a free Flask + Python video tutorial that shows you how to build Flask web app, step-by-step.