Bug:  Jython only forwards slice objects to __getitem__
when __getattr__('__getslice__') raises an AttributeError, which is 
different than Python.  Python forwards a slice object to __getitem__ 
when __getattr__('__getslice__') raises ANY error.

Jython needs to forward a slice object to __getitem__
whenever __getattr__('__getslice__') raises an error to be 
compatible.

###########  Details with Code ###########

The python doc,

http://www.python.org/doc/current/ref/sequence-methods.html

says that __getslice__(self, i, j) is deprecated.  
If no __getslice__ method is found, a slice object is supposed
to get passed to __getitem__.

So if you run:

>>> myObj[i]

Then python calls __getattr__(self, '__getslice__').  If ANY error
is raised, python then indeed forwards the call to 
__getitem__ with the slice object.  The following 
demonstrates that:

<File JythonSliceAnomaly.py>

class JythonSliceAnomaly:

   def __getitem__(self, i):      
      print "\ncalled __getitem__ with type(i)= %s" % type(i)
      return "hello"
      
   def __getattr__(self, name):      
      print "\ncalled __getattr__ with name= %s" % name
      raise Exception("Oops")

Running it in python as follows:

    Python 2.1.1 (#20, Jul 20 2001, 01:19:29) [MSC 32 bit (Intel)] on win32
    Type "copyright", "credits" or "license" for more information.
    >>> import sys
    >>> sys.path.append('/data/rmis/jython/tabledev')
    >>> execfile('/data/rmis/jython/tabledev/JythonSliceAnomaly.py')
    >>> jsa = JythonSliceAnomaly()
    >>> jsa[:]

    called __getattr__ with name= __getslice__

**  called __getitem__ with type(i)= <type 'slice'>  
    'hello'
    >>>

Now watch the Jython version:

    Jython 2.1 on java1.3.1_01 (JIT: null)
    Type "copyright", "credits" or "license" for more information.
    >>> import sys
    >>> sys.path.append('/data/rmis/jython/tabledev')
    >>> execfile('/data/rmis/jython/tabledev/JythonSliceAnomaly.py')
    >>> jsa = JythonSliceAnomaly()
    >>> jsa[:]

    called __getattr__ with name= __getslice__
    Traceback (innermost last):
      File "<console>", line 1, in ?
      File "/data/rmis/jython/tabledev/JythonSliceAnomaly.py", line 9, in __getattr__
    _
    Exception: Oops
    >>>
    
But, if the Exception is changed to an AttributeError, Jython then behaves the same:


<File JythonSliceAnomaly.py>

class JythonSliceAnomaly:

   def __getitem__(self, i):      
      print "\ncalled __getitem__ with type(i)= %s" % type(i)
      return "hello"
      
   def __getattr__(self, name):      
      print "\ncalled __getattr__ with name= %s" % name
      raise AttributeError("Oops")

Produces:

    Jython 2.1 on java1.3.1_01 (JIT: null)
    Type "copyright", "credits" or "license" for more information.
    >>> import sys
    >>> sys.path.append('/data/rmis/jython/tabledev')
    >>> execfile('/data/rmis/jython/tabledev/JythonSliceAnomaly.py')
    >>> jsa = JythonSliceAnomaly()
    >>> jsa[:]

    called __getattr__ with name= __getslice__

**  called __getitem__ with type(i)= org.python.core.PySlice
    'hello'
    >>>