title: cannot set using a multi-index selection indexer with a different length than the value
body: <p>body i meet  a strange problem in data processing
  The code is as follows,
  the datafram is list and the length is 2  ,the other list's length have also 2  ,but  i count the error
  print typr length <a href="https://i.stack.imgur.com/uIZxp.png" rel="nofollow noreferrer">enter image description here</a>
  Output length<a href="https://i.stack.imgur.com/L1k80.png" rel="nofollow noreferrer">enter image description here</a></p>
  <p><a href="https://i.stack.imgur.com/BroCZ.png" rel="nofollow noreferrer">enter image description here</a></p>