• Encapsulate all of the python packages code in virtual environment

  • cd /Users/path_to_project/test

  # Install virtualenv if you don't already have it
  $ sudo pip install virtualenv
  $ virtualenv venv					# Once installed, create a virtual environment
  $ . venv/bin/active				# activate it
  $ pip3 install Flask			# install flask and other packages
  

  • Create required files for Heroku

    • requirements.txt

      $ pip3 freeze > requirements.txt 			# automatically created
      

    • Procfile

       web: gunicorn app:app
      

    • runtime.txt

      python-3.6.0								# forces python 3.6 build
      

  • Login into Heroku (Create an account if you haven't)

  $ heroku login
  > Enter your email + password
  $ git init
  $ heroku git:remote -a <app_name>			
  # Once remote repository is created, push your changes
  $ git add .
  $ git commit -m "First Commit"
  $ git push heroku master
  # it will now build the app, head over to the link on your Heroku dashboard and it's done!
  

Once deployed, If you need to make changes and install new requirements

# Make changes to the requirements.txt
$ pip3 install -r requirements.txt 		#Updates the file
$ git add .
$ git commit -m "New Message" 				# Push all the changes to git
$ git push heroku master							# push the changes to production