human
I wrote the below code

    called_without_args = (type(pool_size) == types.FunctionType)
    def real_decorator(func):
        @wraps(func)
        def inner(*args, **kwargs):
            if Random:
                Random.atfork()
            return func(*args, **kwargs)
        inner.parallel = True
        inner.serial = False
        inner.pool_size = (None if called_without_args else pool_size)
        return _wrap_as_new(func, inner)
    if called_without_args:
        return real_decorator(pool_size)
    return real_decorator

What's a good function header?

=====
Here's a good function header?
assistant
#Here's a good function header.

def parallel(pool_size=None):