import os
import json 

def json_serialize(obj, filename):
    f = open(filename, 'w')
    json.dump(obj, f, indent=1)	
    f.close()


def json_load_file(filename):
    if os.path.isdir(filename):
	raise Exception, "%s is a directory -- expected a JSON filename." %(filename)
    f = open(filename)
    obj = json.load(f)
    return obj