python
from oauthlib.oauth2 import BackendApplicationClient
from requests_oauthlib import OAuth2Session
client_id = 'your_client_id'
client_secret = 'your_client_secret'
token_url = 'https://example.com/oauth/token'
client = BackendApplicationClient(client_id=client_id)
oauth = OAuth2Session(client=client)
token = oauth.fetch_token(token_url=token_url,
client_id=client_id,
client_secret=client_secret)
response = oauth.get('https://api.example.com/resource', headers={'Authorization': 'Bearer ' + token['access_token']})
if response.status_code == 200:
else:
