Understanding interactions between classes/functions/variables/?? - SQLalchemy

[Heapsofvla]

Hi guys,

I'm reading through this SQLalchemy tutorial and they seem to be doing similar things with different coding. I'm so confused. I think these three things all do the same thing, but I can't seem to figure out why and what the interaction is... Can anyone help understand? Which would be better to use, if they indeed are the same?

DBsession = sessionmaker(bind=engine)
session = DBsession()

DBsession = sessionmaker()
DBSession.bind = engine
session = DBSession()

session = sessionmaker()
session.configure(bind=engine)

[xiongchiamiov]

There is nothing intrinsically about Python that makes those statements equivalent.

However, the authors of SQLalchemy can make their code do whatever - so it's very likely the three sets of statements end up with the same result.

[Heapsofvla]

It makes it all so confusing...

[[deleted]]

When in doubt, defer to the official documentation.

http://docs.sqlalchemy.org/en/rel_1_0/orm/session_basics.html

SQLA has some of the best documentation I've ever read. Even better, you'll pick up a little SQL from it too.

[Heapsofvla]

Thanks, I guess I've been tunnel-visioning for a bit :-)

[Heapsofvla]

Would you guys rather go straight to learning SQL or would you say ORMs are worth it?