title: Default ordered dictionaries in Python 2.7.x
body: <p>Besides the answers from ~3 years ago in this question: </p>
  
  <p><a href="https://stackoverflow.com/questions/6190331/can-i-do-an-ordered-default-dict-in-python">Can I do an ordered, default dict in Python?</a></p>
  
  <p>Have any implementations been adopted into recent versions of Python? </p>
  
  <p>If not, why not? </p>