scikit-learn MultinomialNB, test accuracy 0.717
alpha 0.01: 10-fold accuracy 0.688 +/- 0.075
alpha 0.10: 10-fold accuracy 0.688 +/- 0.073
alpha 0.50: 10-fold accuracy 0.717 +/- 0.067
alpha 1.00: 10-fold accuracy 0.742 +/- 0.061
alpha 2.00: 10-fold accuracy 0.754 +/- 0.068
logistic regression : 10-fold accuracy 0.742 +/- 0.058
