tasklist

application.py

#old
@app.route("/tasklist/edit/form/<int:tasklist_id>")
@authorized
def edit_tasklist_form(tasklist_id):
    tasklist = Tasklist(tasklist_id)
    return render_template('tasklist_edit.html', tasklist=tasklist)

#refactored

from controllers import tasklist_edit_form
tasklist_edit_form_controller = tasklist_edit_form.Controller(Tasklist)
app.add_url_rule("/tasklist/edit/form/<int:tasklist_id>", endpoint="add_tasklist", view_func=authorized(add_tasklist_controller.handle_request)

tasklist_edit_form.py

...
class Controller(object):
    def __init__(self, tasklist_model_cls):
        self.tasklist_model_cls = tasklist_model_cls

    def handle_request(self, tasklist_id):
        tasklist = self.tasklist_model_cls(tasklist_id)
    return render_template('tasklist_edit.html', tasklist=tasklist)