def test_CV_split(self):
     '''
     Tests the split method to see whether the splits are of the right shape and length
     '''
     X=pd.DataFrame([1,2,3,4,5,6])
     Y=pd.DataFrame([1,2,3,4,4,5])
     n_splits = 3 
     # Initialize CV 
     kfold=CV(X,Y)
     # Do splits of 3
     self.assertEqual(len(kfold.split(n_splits=n_splits)[0]), 3)
     self.assertEqual(len(kfold.split(n_splits=n_splits)[1]), 3)