[FIXED] what does fold_idx really mean and what does it do?

Issue

for model in models:
    model_name = model.__class__.__name__
    accuracies = cross_val_score(model, X_res_train, y_res_train, scoring='accuracy', cv=CV)
    for fold_idx, accuracy in enumerate(accuracies):
        entries.append((model_name, fold_idx, accuracy))

Solution

Its the index number of the row in 'accuracies'

For example if you have this

df = pd.DataFrame({'Marca temporal':[1,2,3,3,4,5,6,7], 'Temperatura':[37,84,55, 60,61,72,36,94]})

accuracies = df["Temperatura"]

for fold_idx, accuracy in enumerate(accuracies):
    print(fold_idx, accuracy)

You can notice it prints the index of each item, and then the item itself

Answered By - Kirsten_J