766     # create the special form for mentors

   767     comment_public = ['public', 'comment']

   768     comment_private = ['score']

   769     comment_admin = ['rank', 'mentor']

   770     class FilterForm(object):

   771       def __init__(self, form, fields):

   772         self.__form = form

   773         self.__fields = fields

   774 

   775       @property

   776       def fields(self):

   777         return dict([(k,i) for k, i in self.__form.fields.iteritems() if k in self.__fields])

   778 

   779       def __iter__(self):

   780         for x in self.__form:

   781           if x.name not in self.__fields:

   782             continue

   783           yield x

   784 

   785       _marker = []

   786       def __getattr__(self, key, default=_marker):

   787         if default is self._marker:

   788           return getattr(self.__form, key)

   789         else:

   790           return getattr(self.__form, key, default)

   791 

   792     context['form'] = form(initial)

   793     context['comment_public'] = FilterForm(context['form'], comment_public)

   794     context['comment_private'] = FilterForm(context['form'], comment_private)

   795     context['comment_admin'] = FilterForm(context['form'], comment_admin)

   796