Comparison of decorator and Flask builtins

comparison.py

from flask import Flask, jsonify, abort, g

import flask_nicely
from flask_nicely.errors import NotFound

app = Flask(__name__)


### With decorator ###

# JSON response view
@app.route('/hello/<name>')
@flask_nicely.nice_json
def hello(name):

    data = {
        "Name": name,
        "Message": "Hello, {}!".format(name)
    }

    return data

# Exception view
@app.route('/error/404')
@flask_nicely.nice_json
def throw_404():

    raise NotFound("Could not find the grail!")


### Without decorator ###

# JSON response view
@app.route('/hello2/<name>')
def hello_two(name):

    data = {
        "Name": name,
        "Message": "Hello, {}!".format(name)
    }

    return jsonify(data=data, status=200, error=None)

# Error handler
@app.errorhandler(404)
def page_not_found(error):

    data = {
        "error": g.get('custom_error_message'),
        "status": error.code,
        "data": None
    }

    response = jsonify(data)
    response.status_code = 404
    return response

# Exception view
@app.route('/error2/404')
def throw_404_two():

    g.custom_error_message = "Could not find the grail!"
    abort(404)


if __name__ == '__main__':

    app.run(host='0.0.0.0', port=5000, debug=True)