Duncan Booth wrote:
> What you really want is for the marker to exist only in its own little
> universe, but the code for that is even messier:
>
> class A(object):
> def __init__(self, n):
> self.data =n
> def make_f():
> marker = object()
> def f(self, x = _marker):
NameError: global name '_marker' is not defined
> if x is _marker:
> x = self.data
> print x
> return f
> f = make_f()
>
>>>> instance = A(6)
>>>> instance.f()
> 6
in another universe, perhaps, but not very far away:
>>> instance.f.im_func.func_defaults[0]
<object object at 0x009EC438>
>>> inspect.getargspec(A.f)
(['self', 'x'], None, None, (<object object at 0x009EC438>,))
</F>
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