['Authorization', ':', 'Digest', ['qop', 'chap'], ['realm',
    'testrealm@host.com'], ['username', 'Foobear'], ['response',
    '6629fae49393a05397450978507c4ef1'], ['cnonce',
    '5ccc069c403ebaf9f0171e9517f40e41']]
Parse an HTTP request Authorization header with Python