def __init__(self, normalise=False, svd_dimensions=None):
        self._Tt = None
        self._should_normalise = normalise
        self._svd_dimensions = svd_dimensions
:param normalise:       should vectors be normalised to length 1
dataset/ETHPy150Open nltk/nltk/nltk/cluster/util.py/VectorSpaceClusterer.__init__