kernel1983 wrote: > In Function Program?Language can use like this: > > define a function: > f = lambda x,y:x,y > > then we use f to define another function: > f2 = f(1) > the f2 should equal to: > f2=lambda y:1,y > > we should be able call f2 with one parameter:f2(2) > just return 1,2 > > but how can I implement the characteristic in Python??I think it could > do like this but HOW-TO?
If you are using python 2.5, then you can use functools.partial, otherwise lookup one of the many curry implementations, like the ones found in http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52549 One found in the comments of that page by Scott David Daniels: def curry(*args, **kwargs): function, args = args[0], args[1:] def result(*rest, **kwrest): combined = kwargs.copy() combined.update(kwrest) return function(*args + rest, **combined) return result so, in your case: f = lambda x,y: (x,y) f2 = functools.partial(f,1) >>> f2(3) 1,3 -- http://mail.python.org/mailman/listinfo/python-list
