issue in datetime

[srinivasreddy]

>>> import bson
>>> from bson import json_util
>>> from datetime import datetime
>>> k = datetime.now()
>>> k
datetime.datetime(2017, 7, 12, 20, 7, 44, 694669)
>>> json_util.dumps(k)
'{"$date": 1499890064694}'
>>> json_util.loads(json_util.dumps(k))
datetime.datetime(2017, 7, 12, 20, 7, 44, 694000, tzinfo=<bson.tz_util.FixedOffset object at 0x237d750>)
>>> j = json_util.loads(json_util.dumps(k))
>>> k ==j 
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: can't compare offset-naive and offset-aware datetimes
>>> 

I think we should respect the datetime as is whether it has timezone or it is naive.

[Parkayun]

Nice idea :)

[kayakMike]

This is for the DATETIME type? Curious about the TIMESTAMP, it looks like this one is a signed 64 bit integer. Should it be unsigned?