这是一个创建分类器的简单 ML 程序。我通过跟随 Google 开发者在 ML 上的播放列表来创建它。当我运行程序时,会输出错误(TypeError: fit() missing 1 required positional argument: 'y_train')。我不明白为什么会出现这种情况。
from scipy.spatial import distance
def euc(a,b):
return distance.euclidean(a,b)
class ScrappyKNN():
def fit(self,X_train,y_train):
self.X_train=X_train
self.Y_train=y_train
def predict(self,X_test):
predictions=[]
for row in X_test:
label = self.closest(row)
predictions.append(label)
return predictions
def closest(self,row):
best_dist = euc(row,self.X_train[0])
best_index=0
for i in range(1,len(self.X_train)):
dist= euc(row,self.X_train[i])
if dist>best_dist:
best_dist=dist
best_index=i
return self.Y_train[best_index]
from sklearn import datasets
from sklearn.cross_validation import train_test_split
from sklearn.metrics import accuracy_score
iris = datasets.load_iris()
X=iris.data
y=iris.target
X_train, X_test, y_train, y_test=train_test_split(X,y,test_size=0.5)
my_classifier=ScrappyKNN
my_classifier.fit(X_train, y_train)
predictions=my_classifier.predict(X_test)
print(accuracy_score(y_test,predictions))
my_classifier=ScrappyKNN
更改为my_classifier=ScrappyKNN()
。你将其设置为类,但实际上你需要的是该类的一个实例。 - user3483203