startup.py

import sys, os

basePath = os.path.abspath(os.path.dirname(os.path.abspath(__file__)))
sys.path.append(basePath)

# Add the experimental package of Yotsuba 3
if not os.path.exists('/path/to/your/copy'):
    raise Exception("Required Yotsuba 3 experimental package")
sys.path.append('/path/to/your/copy')

from yotsuba3.lib import tori

tori.setup('config.xml')

class websiteObjectWithToriBaseInterface(tori.baseInterface):
    def index():
        return self.render("demo.html", msg = "Hello, world")
    index.exposed = True

class websiteObjectWithoutToriBaseInterface:
    def index():
        return "Hello, world"
    index.exposed = True

application = tori.serverInterface.auto(websiteObjectWithToriBaseInterface(), tori.baseURI)