webpy_sample_app.py

import web
from controllers import blog

urls = (
	'/blog', blog.app
)

app = web.application(urls, locals())

if __name__ == "__main__":
	app.run()

webpy_sample_blog.py

import web
from controllers import categories

urls = (
        '/categories', categories.app,
)

app = web.application(urls, locals())

webpy_sample_categories.py

import web

urls = (
        '/index', "index",
)

class index:
    def GET(self):
        return "[GET] /blog/categories/index called"

app = web.application(urls, locals())