human
I wrote the below code

    @functools.wraps(func)
    def wrapped(*args):
        'Wrapped    function.'
        variables = args
        if (argnum is not None):
            argnum_ = (argnum if isinstance(argnum, list) else [argnum])
            variables = [args[i] for i in argnum_]
        for x in variables:
            assert isinstance(x, NDArray), 'type    of    autograd    input    should    NDArray.'
        grads = [zeros_like(x) for x in variables]
        mark_variables(variables, grads)
        with record():
            outputs = func(*args)
        backward(([outputs] if isinstance(outputs, NDArray) else outputs))
        return (grads, outputs)
    return wrapped

What's a good function header?

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

def grad_and_loss(func, argnum=None):