[Python-Dev] Re: [Python-checkins] CVS: python/dist/src/Include rangeobject.h,2.16,2.17

[Fredrik Lundh]

barry wrote:
> As you say, this has always been flaky, inconsistent, underspecified,
> and unpredictable

>>> class C: pass
...
>>> c = C()
>>> len(c)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'C' instance has no attribute '__len__'
>>> len(c)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'C' instance has no attribute '__len__'
>>> len(c)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'C' instance has no attribute '__len__'
>>> len(c)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'C' instance has no attribute '__len__'
>>> len(c)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'C' instance has no attribute '__len__'
>>> len(c)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'C' instance has no attribute '__len__'
>>> len(c)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'C' instance has no attribute '__len__'

looks pretty predictable to me...

</F>