TypeError:f1\u score()至少接受2个参数(给定1个)

我正在尝试运行SGDClassizer,但出现以下错误:

TypeError: f1_score() takes at least 2 arguments (1 given)

pipeline = Pipeline([
 ('clf', SGDClassifier())
])

parameters = {
    'clf__loss': ('log', 'hinge'),
    'clf__penalty': ['l1', 'l2', 'elasticnet'],
    'clf__alpha': [0.001, 0.0001, 0.00001, 0.000001]
}

score_func = make_scorer(metrics.f1_score(average='weighted'))

grid_search = GridSearchCV(pipeline, parameters, n_jobs=3,
verbose=1, scoring=score_func)



grid_search.fit(X, Y)