How to Set Up Python on Heroku with a runtime.txt File?

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To set up Python on Heroku with a runtime.txt file, you need to follow these steps:

  1. Create a runtime.txt file in the root directory of your Python project.
  2. Open the runtime.txt file and specify the Python version you want to use. For example, if you want to use Python 3.9, you would enter python-3.9.9 in the file.
  3. Commit the runtime.txt file to your Git repository.
  4. Create a new Heroku app or open an existing one.
  5. In the Heroku dashboard, navigate to the “Deploy” tab.
  6. Under the “Deployment method” section, select your Git repository.
  7. Under the “Manual deploy” section, select the branch you want to deploy and click the “Deploy Branch” button.
  8. Wait for the deployment to complete.
  9. Once the deployment is complete, navigate to the “Resources” tab and ensure that at least one dyno is running.

Heroku will automatically detect the Python version specified in the runtime.txt file and use it to run your application.

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