flaskrestful with blueprint

app.py

import importlib
import inspect

from flask import Flask
from flask_restful import Resource

app = Flask(__name__)

for module_name in ['v1', 'v2']:
    module = importlib.import_module(module_name)
    for name, obj in inspect.getmembers(module, inspect.isclass):
        if not issubclass(obj, Resource) or obj == Resource:
            continue

        module.API.add_resource(obj, *obj.URLS)

    app.register_blueprint(module.BLUEPRINT, url_prefix=module.URL_PREFIX)

app.run(debug=True)

v1.py

from flask import Blueprint
from flask_restful import Api, Resource

BLUEPRINT = Blueprint(__name__, __name__)
API = Api(BLUEPRINT)
URL_PREFIX = '/v1'


class ItemResource(Resource):
    URLS = ['', '/<item>']

    def get(self, item=None):
        if item is None:
            return 'v1'

        return 'v1 ' + item

v2.py

from flask import Blueprint
from flask_restful import Api, Resource

BLUEPRINT = Blueprint(__name__, __name__)
API = Api(BLUEPRINT)
URL_PREFIX = '/v2'


class ItemResource(Resource):
    URLS = ['', '/<item>']

    def get(self, item=None):
        if item is None:
            return 'v2'

        return ((item + ' ') * 2).strip()