[Python-ideas] __missing__ object/keyword

[Leif Walsh]

On Sat, Nov 8, 2008 at 5:06 PM, Greg Ewing <greg.ewing at canterbury.ac.nz> wrote:
> Python already has the machinery to make this work. All
> that's needed is a way to leave parameters unbound, and
> a syntax for asking "Would I get a NameError if I were to
> refer to this name now?"

Well, there's always

def Foo(*args, **kwargs):
  try:
    x = kwargs['x']
  except KeyError, unused_e:
    x = default_x

-- 
Cheers,
Leif