Can SQLAlchemy be configured to be non-blocking?

python database asynchronous sqlalchemy nonblocking
Matty picture Matty · Apr 18, 2012 · Viewed 16.1k times · Source

I'm under the impression that database calls through SQLAlchemy will block and aren't suitable for use in anything other than synchronous code. Am I correct (I hope I'm not!) or is there a way to configure it to be non-blocking?

Answer

zzzeek picture zzzeek · Apr 18, 2012

You can use SQLA in a non-blocking style using gevent. Here's an example using psycopg2, using psycopg2's coroutine support:

https://bitbucket.org/zzzeek/green_sqla/

I've also heard folks use the same idea with pymysql. As pymysql is in pure Python and uses the sockets library, gevent patches the socket library to be asynchronous.

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