How to use Flasgger with Flask applications using Blueprints?

Now there is an example of blueprint app in https://github.com/rochacbruno/flasgger/blob/master/examples/example_blueprint.py

"""A test to ensure routes from Blueprints are swagged as expected."""from flask import Blueprint, Flask, jsonifyfrom flasgger import Swaggerfrom flasgger.utils import swag_fromapp = Flask(__name__)example_blueprint = Blueprint("example_blueprint", __name__)@example_blueprint.route('/usernames/<username>', methods=['GET', 'POST'])@swag_from('username_specs.yml', methods=['GET'])@swag_from('username_specs.yml', methods=['POST'])def usernames(username):    return jsonify({'username': username})@example_blueprint.route('/usernames2/<username>', methods=['GET', 'POST'])def usernames2(username):    """    This is the summary defined in yaml file    First line is the summary    All following lines until the hyphens is added to description    the format of the first lines until 3 hyphens will be not yaml compliant    but everything below the 3 hyphens should be.    ---    tags:      - users    parameters:      - in: path        name: username        type: string        required: true    responses:      200:        description: A single user item        schema:          id: rec_username          properties:            username:              type: string              description: The name of the user              default: 'steve-harris'    """    return jsonify({'username': username})app.register_blueprint(example_blueprint)swag = Swagger(app)if __name__ == "__main__":    app.run(debug=True)

You just need to add your blueprint's name when you reference endpoint. Blueprints create namespaces. Example below. And useful tip: use app.logger.info(url_for('hello1')) for debugging problems with endpoint - it shows very useful error messages like this Could not build url for endpoint 'hello1'. Did you mean 'api_bp.hello1' instead?.

from flask import Flask, Blueprint, url_forfrom flask_restful import Api, Resourcefrom flasgger import Swagger, swag_fromapp = Flask(__name__)api_blueprint = Blueprint('api_bp', __name__)api = Api(api_blueprint)class Hello(Resource):    @swag_from('hello1.yml', endpoint='api_bp.hello1')    @swag_from('hello2.yml', endpoint='api_bp.hello2')    def get(self, user=''):        name = user or 'stranger'        resp = {'message': 'Hello %s!' % name}        return respapi.add_resource(Hello, '/hello', endpoint='hello1')api.add_resource(Hello, '/hello/<string:user>', endpoint='hello2')app.register_blueprint(api_blueprint)swagger = Swagger(app)app.run(debug=True)

swag_from function have some error to parse file path.you can use doc string to define api in get() first. flasgger will parse MethodView() method like get,post.