session = requests.Session()
session.post(url, auth=HttpNtlmAuth('rambler\\a.mosyagin', 'P@$$w0rd'), headers={"Content-Type":"application/x-www-form-urlencoded"}, data={"credentials":HttpNtlmAuth('rambler\\a.mosyagin', 'P@$$w0rd')})
blah = session.get(чегонибудьтам...