human
Here's a good function header given the following:
I wrote the below code

    if __IPYTHON__:
        return option
    argname = extract_option_object(option).name
    def d(f):
        @wraps(f)
        def _(*args, **kwargs):
            kwargs[argname] = None
            return f(*args, **kwargs)
        return _
    return d

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

def ipython_only(option):