Avoiding boilerplate session handling code in sqlalchemy functions

Question

I have a python application which has lots of small database access functions, using sqlalchemy. I\'m trying to avoid having lots of boilerplate session handling code around

Answer 1

morphyn's suggestion to use a context manager is good. You could make such a context manager by applying the contextlib.contextmanager decorator to a function very much like your first get_ticket_history, replacing the code between try and except with a yield statement and renaming it, say, transaction. PEP 343 has a near-identical example of that name.

Then, use that context manager with the with statement to reimplement get_ticket_history. It looks like SQLAlchemy already provides that function, though, as method begin:

http://docs.sqlalchemy.org/en/rel_0_8/orm/session.html#autocommit-mode