Gabriel Genellina <[EMAIL PROTECTED]> writes: > At Friday 27/10/2006 11:40, Aahz wrote: > > Ben Finney wrote: > > > GLOBAL = object() > > > > > > def insert_ids(ids=GLOBAL): > > > if ids is GLOBAL: > > > ids = get_global_ids() > > > >The one disadvantage of this approach is that it complicates > >pickling if/when you store the stentinel in an instance. There are > >ways of working around that, but none are pleasant. > > But why should you store the sentinel in an instance? It's only > purpose is to detect a special case in the parameter, when None is > not appropiate.
You might be storing values that will later become parameters to the function. ids_to_be_processed_later = { 'chin': [14, 7, 9], 'bin': foo.GLOBAL, 'fin': [74, 98, 12], } serialise_stuff() -- \ "The only tyrant I accept in this world is the still voice | `\ within." -- Mahatma Gandhi | _o__) | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list