sqlalchemy_crud_operations.py

@webapp.route('/dbdisplay')
def display():
  return render_template("dbdisplay.html", 
                          events = Events.query.all())

@webapp.route('/dbdisplay/<event_type>')
def display_by_event_type(event_type):
  return render_template("dbdisplay.html", 
                          events = (Events.query
                                          .filter_by(event_type = event_type)
                                          .all()))