Encoding datetime and uft chars with json

[Attique Tecnologia]

Hello my friends.

I have a problem with json, charset, and python date and time encoding.

My goal is to use web2py rows (db().select()) to simplify my work, but I not find the best way made.

See.

import json

# Not suport python datetime.

from gluon.contrib.simplejson import JSONEncoder

#Not suport python datetime

from gluon.serializers import json

#Suport the python datetime, but not suport charsets utf-8  (~, ç, ^...)

Someone have a solution?

NOTE: I seek in this group but nothing found.