Serialize DynamicDB results

I'm using Python/Boto/Flask to build an api to get user gps data.

The issue is there is a Decimal('1422568178.40941') where I expect there to just be 1422568178.40941. I can get the data as expected though for loops but I need to pass it back out as json with flask-restful.

Now when I hit the API i get a

TypeError: Decimal('1422642498.484733') is not JSON serializable

If I try

users={'tester1','tester2'}
locdata = blutrac.getallusers(users)
print locdata

I get

{'tester1': {u'lat': Decimal('68.2354'), u'user': u'tester1', u'epochtime': Decimal('1422568178.40941'), u'log': Decimal('-48.255')}, 'tester2': {u'lat': Decimal('68.2354'), u'user': u'tester2', u'epochtime': Decimal('1422642498.484733'), u'log': Decimal('-48.255')}}

But with

gpstracks = Table('gpstrack')
resuts = gpstracks.query_2(
    user__eq='tester1',
    reverse=True,
    limit=1
)
for result in results:
    for item in result:
        print item

I get:

68.2354 tester1 1422642498.484733 -48.255

Model:

from boto.dynamodb2.table import Table

def getallusers(users):
    locations = {}
    for user in users:
        userlocation = getuserlast(user)
        locations[user] = userlocation
    return locations

def getuserlast(user):
    userdata = {}
    gpstracks = Table('gpstrack')
    results = gpstracks.query_2(
        user__eq=user,
        reverse=True,
        limit=1
    )
    for result in results:
        return result._data

View:

# LocationList
#   shows a list of most recent locations of listed users
class LocationList(Resource):
    def get(self):
        users = {'user1', 'user2'}
        data = blutrac.getallusers(users)
        print data
        return data
api.add_resource(LocationList, '/api/locations')

Browser JS code:

<script type="application/javascript">

function GetData() {
    $( ".location").empty();
    $.ajax({
        type: "GET",
        url: "/api/locations",
        contentType: "application/json; charset=utf-8",
        crossDomain: true,
        dataType: "json",
        success: function (data, status, jqXHR) {

            console.log(data);
            for (user in data ){
             console.log(user);

            }

        },

        error: function (jqXHR, status) {
            // error handler
            console.log(jqXHR);
            alert('fail' + status.code);
        }
    });
}
</script>