callback_price.py

# Copyright 2023 Coinbase Global, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import requests, json
from dash import Input, Output

def register_price(app):

    @app.callback(
        Output('price-ref', 'children'),
        Input('product-switcher', 'value'))
    def update_price(product_id_selection):
        denomination = product_id_selection.split('-')[1]

        url = f'https://api.exchange.coinbase.com/products/{product_id_selection}/ticker'
        headers = {'Accept': 'application/json'}
        response = requests.get(url, headers=headers)
        parse = json.loads(response.text)
        price_val = parse['price']

        return f'The price of {product_id_selection} is {price_val} {denomination}.'