don't call k-means with empty data (new scikit-learn value-errors)
don't call k-means with empty data (new scikit-learn value-errors)

wattlebird/pystruct,d-mittal/pystruct,d-mittal/pystruct,wattlebird/pystruct,pystruct/pystruct,amueller/pystruct,pystruct/pystruct,massmutual/pystruct,amueller/pystruct,massmutual/pystruct