Been writing python for a long time. When I wrote this code, I could not figure out why I was getting a syntax error.
d1 = dict( user_id=99, display_name='Matt Wilson',) d2 = dict( firstname.lastname@example.org', **d1,)
It is the trailing comma after **d1. It is not OK. Which is really weird, because the trailing comma after display_name=’Matt Wilson’ is just fine.