from sklearn.neighbors import KNeighborsClassifier
import numpy as np
clf_knn = KNeighborsClassifier(n_neighbors=3)
clf_knn.fit(features_train,labels_train)
pred = clf_knn.predict(features_test)
from sklearn.metrics import accuracy_score
acc_knn = accuracy_score(pred, labels_test)
print 'KNN accuracy is: ', acc_knn
>>>>>>>>>>>>>>>>
KNN accuracy is:  0.936