How to deploy python modules on Heroku?

Heroku is a cloud platform that makes it easy to deploy Python applications. This guide walks you through deploying a Python module to Heroku using Git and the Heroku CLI.

Prerequisites

Before deploying to Heroku, ensure you have −

• Python 3.6+ installed locally
• Pipenv or pip for dependency management
• Heroku CLI installed and logged in
• Git repository for your application

Follow the official Heroku Python setup guide for initial configuration.

Creating a Heroku Application

Navigate to your project's root directory and create a new Heroku application ?

$ heroku create
Creating lit-bastion-5032 in organization heroku... done, stack is cedar-14
https://lit-bastion-5032.herokuapp.com/ | https://git.heroku.com/lit-bastion-5032.git
Git remote heroku added

Heroku generates a random name (like lit-bastion-5032) for your app and adds a git remote called heroku to your local repository. You can specify a custom name using heroku create your-app-name.

Required Files

Your Python application needs specific files for Heroku deployment ?

requirements.txt

Create a requirements.txt file listing all dependencies with version numbers ?

Flask==2.3.2
Jinja2==3.1.2
Werkzeug==2.3.6
requests==2.31.0
gunicorn==20.1.0

Procfile

Create a Procfile to specify how Heroku should run your application ?

web: gunicorn app:app

Deploying to Heroku

Push your code to Heroku using Git ?

$ git push heroku master
Counting objects: 232, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (217/217), done.
Writing objects: 100% (232/232), 29.64 KiB | 0 bytes/s, done.
Total 232 (delta 118), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Python app detected
remote: -----> Installing python-3.6.0
remote: -----> Installing requirements with latest pipenv...
remote:        Installing dependencies from Pipfile.lock...
remote:    $ python manage.py collectstatic --noinput
remote:        58 static files copied to '/app/gettingstarted/staticfiles', 58 post-processed.
remote:
remote: -----> Discovering process types
remote:        Procfile declares types -> web
remote:
remote: -----> Compressing...
remote:        Done: 39.3M
remote: -----> Launching...
remote:        Released v4
remote:        http://lit-bastion-5032.herokuapp.com/ deployed to Heroku
remote:
remote: Verifying deploy... done.
To git@heroku.com:lit-bastion-5032.git
 * [new branch]      master -> master

Key Deployment Steps

Conclusion

Deploying Python modules to Heroku requires a git repository, proper dependency specification in requirements.txt, and a Procfile. Once configured, deployment is as simple as pushing to the Heroku git remote.