Buzhug
Buzhug is a “fast, pure-Python database engine” that is supposed to appear to Python programmers. It doesn’t use SQL, using list comprehensions or generator expressions instead. You end up with syntax something like this:
for record in [ r for r in db if r.name == 'pierre' ]:
print record.name,record.age
Interesting, but I’m not sure I’d ever actually use it.