access_token_url = 'https://www.instapaper.com/api/1/oauth/access_token'
consumer = oauth.Consumer(consumer_key, consumer_secret)
client = oauth.Client(consumer)
client.add_credentials(instaaccount, instapassword)
params = {}
params['x_auth_username'] = instaaccount
params['x_auth_password'] = instapassword
params['x_auth_mode'] = 'client_auth'
client.set_signature_method = oauth.SignatureMethod_HMAC_SHA1()
resp, token = client.request(access_token_url, method='POST', body=urllib.parse.
    urlencode(params))
xauth с использованием python-oauth2