I was trying to use Google Appengine Flask and SQLAlchemy to connect to PostgreSQL server. It was not working because it was giving error something something like can not import psycopg2._psycopg2. After a while I've learned that you have to use Google Appengine with pure Python PostgreSQL driver, which is called PG8000.

But now I'm seeing psycopg2 in this repository again. It's so confusing. Is psycopg2 supported by GAE or not?

Edit: I'm talking about this: https://github.com/GoogleCloudPlatform/python-docs-samples/blob/master/appengine/flexible/cloudsql/requirements.txt