import inspect

def hiddendec(func):
    assert inspect.isfunction(func)
    argnames, args, kwdargs, defaults = inspect.getargspec(func)
    doc = func.__doc__
    name = func.__name__
    argspec = ", ".join(argnames)
    wrapper = "def %s(%s):\n    %s.real(%s)\n" % (name, argspec, name, argspec)
    print wrapper
    def real_dec(*args):
        print "hi"
        return func(*args)
    hidden_co = compile(wrapper, 'hiddendec', 'exec')
    namespace = {}
    exec hidden_co in namespace
    hidden = namespace[name]
    hidden.__doc__ = doc
    hidden.real = real_dec
    return hidden

@hiddendec
def foo(one, two):
    """this is the foo doc"""
    print "one:", one, "two:", two