import pickle

def with_print(func):
    """ Decorate a function to print its arguments.
    """
    def my_func(*args, **kwargs):
        print args, kwargs
        return func(*args, **kwargs)

    return my_func

@with_print
def f(x):
    print 'f called'


def try_pickle(f):
    try:
        pickle.dumps(f)
        print 'Pickling successful'
    except pickle.PicklingError, e:
        print e
        print "Oops, can't pickle"

try_pickle(f)

################################################################################
class WithPrint(object):
    
    def __init__(self, func):
        self.func = func

    def __call__(self, *args, **kwargs):
        print args, kwargs
        return self.func(*args, **kwargs)


@WithPrint
def g(x):
    print 'g called'

try_pickle(g)

def h(x):
    print 'h called'

i = WithPrint(h)

try_pickle(i)

################################################################################
from functools import wraps

def with_print(func):
    """ Decorate a function to print its arguments.
    """
    @wraps(func)
    def my_func(*args, **kwargs):
        print args, kwargs
        return func(*args, **kwargs)

    return my_func

@with_print
def j(x):
    print 'j called'

try_pickle(j)

################################################################################