[Python-Dev] locals(), closures, and IronPython...

[Greg Ewing]

Andrew Dalke wrote:

>     def __init__(self, prec=None, rounding=None,
>                  traps=None, flags=None,
>                  _rounding_decision=None,
>                  Emin=None, Emax=None,
>                  capitals=None, _clamp=0,
>                  _ignored_flags=None):
>           ...
>         for name, val in locals().items():
>             if val is None:
>                 setattr(self, name, _copy.copy(getattr(DefaultContext, name)))
>             else:
>                 setattr(self, name, val)

Hmmm. For things like that, maybe what you really
want is to be able to give  the ** arg a default value:

   def __init__(self, **kwds = dict(rec=None, rounding=None,
                   traps=None, flags=None,
                   _rounding_decision=None,
                   Emin=None, Emax=None,
                   capitals=None, _clamp=0,
                   _ignored_flags=None))
      for name, val in kwds:
         ...

Although you can get a similar effect now by doing

      def __init__(self, **kwds):
         args = dict(prec=None, rounding=None,
                   traps=None, flags=None,
                   _rounding_decision=None,
                   Emin=None, Emax=None,
                   capitals=None, _clamp=0,
                   _ignored_flags=None)
         args.update(kwds)
         for name, value in args:
            ...

So, no need for locals() here.

--
Greg