numpy.loadtxt('iris.data.txt', delimiter = ',', converters ={4:read_label2})

data in iris.data.txt file such as: 4.6,3.2,1.4,0.2,Iris-setosa 5.3,3.7,1.5,0.2,Iris-setosa 7.0,3.2,4.7,1.4,Iris-versicolor 6.4,3.2,4.5,1.5,Iris-versicolor ############################################

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