Use `requests` to obtain temporary credential for accessing AWS S3 from AWS IoT device certificate and private key

obtain_credentials.py

import requests


credential_provider_endpoint = 'https://<your_credentials_provider_endpoint>/role-aliases/iot-s3-access-role-alias/credentials'
device_cert_path = '<path_to_device_cert>'
device_private_key_path = '<path_to_device_private_key>'
resp = requests.get(
    credential_provider_endpoint, 
    headers={'x-amzn-iot-thingname': 'TestThing'}, 
    cert=(device_cert_path, device_private_key_path),
)

if resp:  # check whether https request succeeds
    credentials = resp.json()
    access_key_id = credentials['credentials']['accessKeyId']
    secrete_access_key = credentials['credentials']['secretAccessKey']
    session_token = credentials['credentials']['sessionToken']
else:
    print('error requesting temporary access to AWS S3')