Update app.py

app.py

@@ -1,4 +1,4 @@
-from flask import Flask,render_template,request,Response,jsonify,session,redirect,url_for
+from flask import Flask,render_template,request,Response,jsonify,session,redirect,url_for,session
 import numpy as np
 from sklearn.metrics.pairwise import cosine_similarity
 import matplotlib.pyplot as plt
@@ -14,6 +14,7 @@ from io import BytesIO
 app=Flask(__name__)
 folder='static/images'
 app.config["UPLOAD_FOLDER"]=folder
+app.config['PERMANENT_SESSION_LIFETIME']=3600
 app.secret_key="mykey"
 pair={}
 def pred_ver_and_save_data(img,img_file,data,digit,name,vector,brand,desc,cat,price):