On 2006-10-04, Nick Craig-Wood <[EMAIL PROTECTED]> wrote: > Antoon Pardon <[EMAIL PROTECTED]> 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 -- http://mail.python.org/mailman/listinfo/python-list
