IndexError: list index out of range

Question

能帮我解决一下这个问题吗？已经被困扰好几天了，谢谢

from sklearn.svm import SVC   
svclf = SVC(kernel = 'linear') 
svclf.fit(x_train,y_train)  
preds = svclf.predict(x_test);  
num = 0
preds = preds.tolist()
for i,pred in enumerate(preds):
    if int(pred) == int(y_test[i]):    #（这一行报错）
        num += 1
print ('precision_score:' + str(float(num) / len(preds)))

Answer 1

你查下

from sklearn.svm import SVC
svclf = SVC(kernel = 'linear')
svclf.fit(x_train,y_train)
preds = svclf.predict(x_test);
num = 0
preds = preds.tolist()
len_y_test = len(y_test)
for i,pred in enumerate(preds):
    if i >= len_y_test:
        raise IndexError('y_test的长度为{}, i要取{}, 超出索引了'.format(len_y_test, i))
    if int(pred) == int(y_test[i]):    #（这一行报错）
        num += 1
print ('precision_score:' + str(float(num) / len(preds)))