add pereodic func

app.py

@@ -1,7 +1,7 @@
 from flask import Flask, render_template, request, redirect, url_for
 from flask_migrate import Migrate
 from models import db, Data
-
+from threading import Timer
 
 app = Flask(__name__)
 
@@ -15,6 +15,10 @@ db.init_app(app)
 
 migrate = Migrate(app, db)
 
+
+def calculateAverageper():
+    pass
+
 def createDb():
     with app.app_context():
         db.create_all()