from functools import wraps
def refresher(refresh_func):
    def wrapper(func):
        @wraps(func)
        def inner(*a,**k):
            try:
                return func(*a,**k)
            except:
                refresh_func()
                return func(*a,**k)
        return inner
    return wrapper

@refresher(refresh)
def load_list(filename):
    return pickle.load(file(filename))