knn confusion

[HengYuh]

hello,I think this place in knn part :
for i in range(N):
X_train_folds.append(X_train[i*length: (i+1)length])
y_train_folds.append(y_train[ilength: (i+1)length])
may should be:
for i in range(num_folds):
X_train_folds.append(X_train[ilength: (i+1)length])
y_train_folds.append(y_train[ilength: (i+1)*length])