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Unlock 1+ expert-curated psycopg2 tutorials, real-world code snippets, and modern dev strategies. From fundamentals to advanced topics, boost your psycopg2 skills on DeveloperBreeze.
Heroku's DATABASE_URL uses the older postgres:// scheme, which isn't compatible with the latest SQLAlchemy requirements. Starting with SQLAlchemy 1.4, postgres:// is considered deprecated and no longer supported. The explicit postgresql+psycopg2:// scheme is required.
DATABASE_URL
postgres://
postgresql+psycopg2://
Without this replacement, SQLAlchemy might throw an error like: