[Python-Dev] PEP 309 updated slightly

[Alex Naanou]

though this might be a bit late, I would like to suggest something a
bit functionally different:
---cut---
class LCurry(object):
   '''
   this is the left curry class.
   '''
   def __new__(cls, func, *args, **kw):
       obj = object.__new__(cls)
       if isinstance(func, LCurry) or isinstance(func, RCurry):
           obj._curry_func = func._curry_func
           obj._curry_args = (func._curry_args[0] + args, func._curry_args[1])
           obj._curry_kw = kw = kw.copy()
           kw.update(func._curry_kw)
       else:
           obj._curry_func = func
           obj._curry_args = (args, ())
           obj._curry_kw = kw.copy()
       return obj
   def __call__(self, *args, **kw):
       self._curry_func(*self._curry_args[0] + args +
self._curry_args[1], **dict(self._curry_kw.items() + kw.items()))

--uncut--

this mainly has one thing different from the reference implementation
in the pep:
1) it is recursive
that is we can curry/partial something more than one and yet avoid the
extra function call per curry level...

IMO this is a worthwhile optimisation....

taken from: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/222061