It depends on how long they are. I tend to structure them like so:
[x.id for x
in self.db.query(schema.allPostsUuid).execute(timeout=20)
if x.type == 'post'
and x.deleted is not False
and ...
and ...]
That way every expression has its own line.
If any line becomes too big I like to extract it out in a lambda or expression:
transform = lambda x: x.id
results = self.db.query(schema.allPostsUuid).execute(timeout=20)
condition = lambda x: x.deleted is not False and ... and ...
[transform(x) for x in results if condition(x)]
And then if a lambda becomes too long it gets promoted to a function.