Simple Traits Questions

[Ethan Furman]

Okay, different post for my actual questions.  :)

On the PyPI page for strait (http://pypi.python.org/pypi/strait/0.5.1) 
it has the example of choosing which methods to keep in the composed class:

class TOSWidget(BaseWidget):
     __metaclass__ = include(Pack, Place, Grid)
     info = Pack.info.im_func
     config = Pack.config.im_func
     configure = Pack.configure.im_func
     slaves = Pack.slaves.im_func
     forget = Pack.forget.im_func
     propagate = Pack.propagate.im_func

My question is:

Why use

     info = Pack.info.im_func

instead of

     info = Pack.info

?

Any and all enlightenment appreciated!

~Ethan~