REST APIs with Flask and Python - Adding PostgreSQL to Your Heroku App

The video tutorial explains how to switch from SQLite to Postgres using Heroku add-ons. It covers the installation and configuration of Heroku Postgres, setting up environment variables, and integrating Psycopg2 with SQLAlchemy. The tutorial also demonstrates deploying the application and testing database connections, emphasizing the importance of using environment variables for seamless database integration.

What is the purpose of the environment variable in the context of Heroku and Postgres?

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What should you do if you want to run the app locally without the Heroku environment variable?

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What library is required to interact with Postgres in Python applications?

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