OAuth2_example_class.py

import requests
import base64


def base64_encode_string(s):
    return base64.b64encode(s.encode()).decode()


class MyAPI:
    def __init__(self, token_url, client_id, client_secret):
        self.token_url = token_url
        self.token = None
        self.client_id = client_id
        self.client_secret = client_secret

    def get_token(self):
        headers = {
            'Authorization': 'Basic ' +
            base64_encode_string(self.client_id + ':' + self.client_secret),
            'Content-Type': 'application/x-www-form-urlencoded',
        }

        params = {
            'grant_type': 'client_credentials',
        }

        r = requests.post(self.token_url, headers=headers, params=params)

        self.token = r.json()['access_token']
        return self.token

    def endpoint(self, url):
        if self.token is None:
            self.get_token()

        headers = {'Authorization': 'Bearer ' + self.token}

        r = requests.get(url, headers=headers)

        if r.status_code == 401:
            # status code timed out, refresh token
            self.token = None
            return self.endpoint(url)

        return r.json()


if __name__ == '__main__':
    # You need to register an "app" on Spotify and 
    # go to your dashboard at 
    # https://developer.spotify.com/dashboard/applications
    # to get the client id and client seceret
    CLIENTID = 'your_client_id'
    CLIENTSECRET = 'your_client_secret'

    SpotifyAPI = MyAPI('https://accounts.spotify.com/api/token', CLIENTID, CLIENTSECRET)

    print(SpotifyAPI.endpoint('https://api.spotify.com/v1/tracks/2TpxZ7JUBn3uw46aR7qd6V'))