gistfile1.txt

class ShortGeoJSONEncoder(json.JSONEncoder):
    def default(self, obj):
        print 'GEOJSON'
        if type(obj) == float:
            #return float("{:.6f}".format(obj))
            return 'FOO'
        else:
            return 'BAR'
            #return json.JSONEncoder.default(self, obj)
            
            
print json.dumps(geojson, cls=ShortGeoJSONEncoder)