how do the main entities in flask interplay

from flask import Flask
from endpoints import bp

def create_app():
    app = Flask(__name__)
    app.register_blueprint(bp, url_prefix='/')
    return app

from flask import Blueprint, jsonify

bp = Blueprint('endpoints', __name__)

@bp.route('/api/v1/system/analyze', methods=['POST'])
## not sure about types here, the flask view function must return flask.Response
def analyze():  
    return jsonify([
        {
            "name": "dear " + entry["name"],
            "salary": entry["salary"] + 37
        }
        for entry in request.get_json()
        if request.is_json
    ])

applicaton = create_app()

if __name__ == '__main__':
    application.run()