类型错误：predict（）缺少1个必需的位置参数：“X”

Question

我似乎总是用这段代码犯这个错误。这是来自YouTube的教程，我似乎把一切都做好了

代码如下：

import sklearn
from sklearn import datasets
iris = datasets.load_iris()

X = iris.data
y = iris.target

from sklearn.model_selection import train_test_split
X_train, X_test, y_train, y_test = train_test_split(X,y, test_size = .5)

from sklearn import tree
my_classifier = tree.DecisionTreeClassifier

my_classifier.fit(X_train, y_train)


predictions = my_Classifier.predict(X_test)

from sklearn.metrics import accuracy_score
print(accuracy_score)