Update db.py

db.py

@@ -31,7 +31,7 @@ class Database:
         c = self.conn.cursor()
         c.execute('''
                     INSERT INTO user_detail (name, dob, class) VALUES (?, ?, ?)
-                ''', (userDetail.student_name, userDetail.dob, userDetail.class))
+                ''', (userDetail.student_name, userDetail.dob, userDetail.class_std))
         self.conn.commit()
         user_id = c.lastrowid
         c.close()