We are getting error as : TypeError: 'NoneType' object is not subscriptable what should we do

Question

def split_data(data):
    print("Splitting data...")
    features = data[:,1]
    labels = data[:,0]
    training_data, test_data, training_labels, test_labels = train_test_split( features, 
    labels, test_size=0.3, random_state=0)
    print(labels)
    print("flag 3: splitted data")
    return training_data, test_data, training_labels, test_labels

And here we are getting error as : in split_data(data) 1 def split_data(data): 2 print("Splitting data...") ----> 3 features = data[:,1] 4 labels = data[:,0] 5 training_data, test_data, training_labels, test_labels = train_test_split( features, labels, test_size=0.3, random_state=0)

TypeError: 'NoneType' object is not subscriptable

Here type of data is array, we have tried data as dataframe also but it didn't work,What should we do?