On 2006-10-04, Nick Craig-Wood <nick at craig-wood.com> wrote:
> Antoon Pardon <apardon at forel.vub.ac.be> wrote:
>> One possible way to do what I think you want is to code as follows:
>>>> class Default (object):
>> pass
>> I'd have written
>> Default = object()
>>> def f(var=Default):
>> if var is Default:
>> var = 1
>> return var * 2
>> But yes, defining a sentinel like this is a good idea.
The problem is that a lot of built in and library functions
are not written this way. So when f is one of those, you
are stuck.
--
Antoon Pardon
