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Complete this python program:
def make_label_dec(label, ds=None):
assistant
#Here is the Python code you requested.

    """Factory function to create a decorator that applies one or more labels.
    Parameters
    label : string or sequence
    One or more labels that will be applied by the decorator to the functions
    it decorates.  Labels are attributes of the decorated function with their
    value set to True.
    ds : string
    An optional docstring for the resulting decorator.  If not given, a
    default docstring is auto-generated.
    Returns
    A decorator.
    Examples
    A simple labeling decorator:
    >>> slow = make_label_dec(\slow\)
    >>> slow.__doc__
    "Labels a test as \slow\."
    And one that uses multiple labels and a custom docstring:
    >>> rare = make_label_dec([\slow\,\hard\],
    ... "Mix labels \slow\ and \hard\ for rare tests.")
    >>> rare.__doc__
    "Mix labels \slow\ and \hard\ for rare tests."
    Now, let\s test using this one:
    >>> @rare
    ... def f(): pass
    >>> f.slow
    True
    >>> f.hard
    True
    """
    warnings.warn('The    function    `make_label_dec`    is    deprecated    since    IPython    4.0', DeprecationWarning, stacklevel=2)
    if isinstance(label, str):
        labels = [label]
    else:
        labels = label
    tmp = (lambda : None)
    for label in labels:
        setattr(tmp, label, True)
    def decor(f):
        for label in labels:
            setattr(f, label, True)
        return f
    if (ds is None):
        ds = ('Labels    a    test    as    %r.' % label)
    decor.__doc__ = ds
    return decor