parsing some data from jta 3D model in python

jta.py

import json
import numpy
import base64

def open_model(path):
    jta = json.load(open(path, "r"))
    attrs = []
    for attr in jta['attributes']:
        v_blob = base64.b64decode(attr['vertices']['position']['data'])
        i_blob = base64.b64decode(attr['polygons']['data'])
        attrs.append({
            'vertices' : numpy.fromstring(v_blob, dtype=numpy.float16),
            'indices' : numpy.fromstring(i_blob, dtype=numpy.uint16),
        })
    return attrs