human
Complete the below
def create_app():

    ''''Creates the pygal test web app'
    '''

=====
Write me a the Python program you requested?
assistant
#Here is the Python program you requested.
    app = Flask(__name__)
    @app.route('/')
    def index():
        return render_template('index.jinja2', charts_names=CHARTS_NAMES, configs=CONFIG_ITEMS, interpolations=INTERPOLATIONS, styles_names=styles.keys())
    @app.route('/svg', methods=('POST',))
    def svg():
        values = request.values
        config = loads(values['opts'])
        config['disable_xml_declaration'] = True
        config['style'] = styles[values['style']]
        config['js'] = []
        for item in CONFIG_ITEMS:
            value = config.get(item.name, None)
            if value:
                config[item.name] = item.coerce(value)
        chart = CHARTS_BY_NAME[values['type']](**config)
        for serie in loads(values['vals'])['vals']:
            chart.add(serie[0], serie[1])
        t = time()
        svg = chart.render()
        tt = int(((time() - t) * 1000))
        return jsonify(svg=svg, time=tt)
    return app