Urwid Tree Container API

 This is a Widget Container API for the urwid toolkit. It uses a MVC
 approach and allows one to build trees of widgets. Its design goals are:
 .
  * clear separation classes that define, decorate and display trees of.
  * widgets representation of trees by local operations on node positions.
  * easy to use default implementation for simple trees Collapses are.
  * considered decoration.
 .
 This package is for Python 2 environment.