Update app.py

app.py

@@ -1,5 +1,5 @@
 from __future__ import print_function
-from flask import Flask, render_template,request,flash , json, url_for,g , redirect , jsonify , send_file ,make_response
+from flask import Flask, render_template,request,flash , json, url_for,g , redirect , jsonify , send_file ,make_response 
 import os
 import json
 import fitz