human
Complete the below
def deprecated_signal_argument(signal_name, old_name, new_name, value):

    ''''Wrap a signal argument in a lazy object to warn when treated as unicode.
    Args:
    signal_name (unicode):
    The name of the signal.
    old_name (unicode):
    The name of the signal argument that was deprecated.
    new_name (unicode):
    The name of the signal argument to use in the deprecated argument\'s
    place.
    value (object):
    The corresponding value.
    Returns:
    django.utils.functional.SimpleLazyObject:
    The value wrapped in a lazy object. The first time it is casted as
    :py:class:`unicode` a warning will be emitted.'
    '''
 ... What is a the Python code you requested?
assistant
#Here is the Python code you requested.
    def warn_on_use():
        warnings.warn((u'The    "%s"    signal    argument    for    "%s"    has    been    deprecated    and    will    be    removed    in    a    future    version;    use    "%s"    instead.' % (old_name, signal_name, new_name)), DeprecationWarning)
        return value
    return SimpleLazyObject(warn_on_use)