app.conf

handlers:
  - url: /static/(.*)
    static_files: templates/static/$1

  - url : /.*
    script: app.py

app.py

#!/usr/bin/env python
# -*- encoding: utf-8; indent-tabs-mode: nil -*-
#
# Copyright 2013 Menglong TAN <tanmenglong@gmail.com>
#

import os
from flask import Flask, g, request, config, session, render_template

# set static file path
app = Flask(__name__,
            static_folder=os.path.join(os.path.dirname(__file__),
                                       "templates/static"))