code: def __update_kind(uid, kind):
          '''
          update the kind of post.
          '''
  
          entry = TabPost.update(
              kind=kind,
          ).where(TabPost.uid == uid)
          entry.execute()
          return Truf __update_kind(uid, kind):
          '''
          update the kind of post.
          '''
  
          entry = TabPost.update(
              kind=kind,
          ).where(TabPost.uid == uid)
          entry.execute()
          return True
docs: update the kind of post.