How to check if PostgreSQL schema exists using SQLAlchemy?

Question

I am using SQLAlchemy to generate tables in a specific schema in a PostgreSQL database. If the schema does not exist, I want to create it. I know the PostgreSQL query to che

Answer 1

@javax's answer is almost correct; the following is a little clarification:

q = exists(select([("schema_name")]).select_from("information_schema.schemata")
    .where("schema_name = 'foo'"))
if not session.query(q).scalar():
    session.execute('CREATE SCHEMA foo;')