As previously discussed, i'm using an object's history to log changes to 
the database within an application.

http://docs.sqlalchemy.org/en/rel_0_8/orm/session.html?highlight=history#sqlalchemy.orm.attributes.History

"Each tuple member is an iterable sequence"

I'm trying to figure out when I would expect that sequence to have more 
than 1 item in it.

My guess is that for object relationships, it might contain a list of more 
than one element -- but for column data it would only be a single element. 
 is that correct or am I off  ?

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