changing __call__ on demand

[Kent Johnson]

Stefan Behnel wrote:
> Hi!
> 
> This somewhat puzzles me:
> 
> Python 2.4 (#1, Feb  3 2005, 16:47:05)
> [GCC 3.3.4 (pre 3.3.5 20040809)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> 
> .>>> class test(object):
> ...   def __init__(self):
> ...     self.__call__ = self.__call1
> ...   def __call1(self):
> ...     print 1
> ...   def __call__(self):
> ...     print 2
> ...
> .>>> t = test()
> .>>> t()
> 2
> 

It works the way you want if test is an old-style class:
  >>> class test:
  ...  def __init__(self):
  ...    self.__call__ = self.__call1
  ...  def __call1(self):
  ...    print 1
  ...  def __call__(self):
  ...    print 2
  ...
  >>> t=test()
  >>> t()
1

Kent