How to create a new database using SQLAlchemy?

Question

Using SQLAlchemy, an Engine object is created like this:

from sqlalchemy import create_engine
engine = create_engine(\"postgresql://localhost/mydb\")
         


        

Answer 1

It's possible to avoid manual transaction management while creating database by providing isolation_level='AUTOCOMMIT' to create_engine function:

import sqlalchemy

with sqlalchemy.create_engine(
    'postgresql:///postgres',
    isolation_level='AUTOCOMMIT'
).connect() as connection:
    connection.execute('CREATE DATABASE my_database')

Also if you are not sure that database doesn't exist there is a way to ignore database creation error due to existence by suppressing sqlalchemy.exc.ProgrammingError exception:

import contextlib
import sqlalchemy.exc

with contextlib.suppress(sqlalchemy.exc.ProgrammingError):
    # creating database as above