Swagger blueprint

blueprints.py

from flask import Blueprint, jsonify
from connexion import Api

class Swagger:

    def blueprint(spec, **yaml_kwargs):
        api = Api(spec, swagger_ui=True, strict_validation=True, validate_responses=False, arguments=yaml_kwargs)
        bp = api.blueprint

        @bp.errorhandler(404)
        def endpoint_not_found(e):
            return jsonify({'not': 'found'}), 404

        return bp