Cheetah/Tools/RecursiveNull.py

   1 #!/usr/bin/env python
   2 """Nothing, but in a friendly way.  Good for filling in for objects you want to
   3 hide.  If $form.f1 is a RecursiveNull object, then
   4 $form.f1.anything["you"].might("use") will resolve to the empty string.
   5
   6 This module was contributed by Ian Bicking.
   7 """
   8
   9 class RecursiveNull:
  10       __doc__ = __doc__ # Use the module's docstring for the class's docstring.
  11       def __getattr__(self, attr):
  12               return self
  13       def __getitem__(self, item):
  14               return self
  15       def __call__(self, *vars, **kw):
  16               return self
  17       def __str__(self):
  18               return ''
  19       def __repr__(self):
  20               return ''
  21       def __nonzero__(self):
  22               return 0
  23