Nested classes, with autorouting, see https://github.com/mattseh/flask-classy

gistfile1.py

from flask import Flask, url_for
from flask.ext.classy import FlaskView

# we'll make a list to hold some quotes for our app
quotes = [
    "A noble spirit embiggens the smallest man! ~ Jebediah Springfield",
    "If there is a way to do it better... find it. ~ Thomas Edison",
    "No one knows what he can do till he tries. ~ Publilius Syrus"
]

app = Flask(__name__)

class QuotesView(FlaskView):
  def index(self):
    return "<br>".join(quotes)

  def arbritary(self):
    return 'whatever'


  class NestedView(FlaskView):
    def index(self):
      return 'I am nested'

    class DoubleNestedView(FlaskView):
      def index(self):
        return 'I am double nested'

    class PotatoView(FlaskView):
      def index(self):
        return 'I love potatoes'

  class SubView(FlaskView):
    def index(self):
      return 'this is sub'

    class SubSubView(FlaskView):
      def index(self):
        return 'this is subsub'

    class SubView(FlaskView):
      def index(self):
        return 'Nested sub, same class names'

QuotesView.register(app)
SubView.register(app)

if __name__ == '__main__':
    app.run(debug=True)