Create a metaclass to automatically register new views with the app in Flask-Classy

Flask_Classy_autoregistrant_metaclass.py

from flask import Flask, render_template
from flask.ext.classy import FlaskView, route

# Instantiate the app:
app = Flask(__name__)

# create a metaclass to automatically register views with the app
# and create the class AutoregView to use it
# ------------------------------------------------------------------------------
def Autoregistrant(app=app):
    class _Autoregistrant(type):
        def __init__(cls, name, bases, clsdict):
            cls.register(app)
    return _Autoregistrant

class AutoregView(FlaskView):
    __metaclass__ = Autoregistrant(app)

# Then subclass AutoregView to create your views:
class Index(AutoregView):
    route_base = '/'
    
    @route('')
    def index(self):
        return render_template('index.html')