On Tue, 15 Nov 2005 23:51:18 +0100, "Fredrik Lundh" <[EMAIL PROTECTED]> wrote:
>Steven D'Aprano wrote: > >>> Another solution to this is the use of a 'marker' object and identity test: >>> >>> _marker = [] >>> class A(object): >>> def __init__(self, n): >>> self.data =n >>> def f(self, x = _marker): >>> if x is _marker: >>> x = self.data >>> print x >> >> I would like to see _marker put inside the class' scope. That prevents >> somebody from the outside scope easily passing _marker as an argument to >> instance.f. > >if you don't want people to be able to easily pass _marker as an argument >to the f method, you probably shouldn't use it as the default value. > LOL ;-) Regards, Bengt Richter -- http://mail.python.org/mailman/listinfo/python-list
