verify Fixed flask's json test

flask/app.py

@@ -6,7 +6,7 @@ from random import randint
 import sys
 
 import flask
-from flask import Flask, request, render_template, make_response
+from flask import Flask, request, render_template, make_response, jsonify
 from flask.ext.sqlalchemy import SQLAlchemy
 from sqlalchemy import create_engine