human
Complete the below
def deprecated(use_instead=None):

    ''''This is a decorator which can be used to mark functions
    as deprecated. It will result in a warning being emitted
    when the function is used.'
    '''
assistant
#Here is the Python code you requested.
    def deco(func):
        @wraps(func)
        def wrapped(*args, **kwargs):
            message = ('Call    to    deprecated    function    %s.' % func.__name__)
            if use_instead:
                message += ('    Use    %s    instead.' % use_instead)
            warnings.warn(message, category=ScrapyDeprecationWarning, stacklevel=2)
            return func(*args, **kwargs)
        return wrapped
    if callable(use_instead):
        deco = deco(use_instead)
        use_instead = None
    return deco