在RandomizedSearchCv上执行fit()之后:

        tfidf = TfidfVectorizer(strip_accents=None,lowercase=False,preprocessor=None)
        param_grid =
            {'vect__ngram_range': [(1,1)],'vect__stop_words': [stop, None],
                       'vect__tokenizer': [tokenizer, tokenizer_porter],
                       'clf__penalty': ['l1', 'l2'],
            'clf__C': [1.0, 10.0, 100.0]},
lr_tfidf = Pipeline([('vect', tfidf),('clf',LogisticRegression(random_state=0))])
gs_lr_tfidf = RandomizedSearchCV(lr_tfidf,param_grid,cv=5,n_jobs=1)
gs_lr_tfidf.fit(X_train, y_train)


我收到以下错误:

    Traceback (most recent call last):
  File "G:/pythonprojectraschka/ch08/ch08-2.py", line 95, in <module>
    gs_lr_tfidf.fit(X_train, y_train)
  File "C:\Anaconda3\lib\site-packages\sklearn\grid_search.py", line 996, in fit
    return self._fit(X, y, sampled_params)
  File "C:\Anaconda3\lib\site-packages\sklearn\grid_search.py", line 553, in _fit
    for parameters in parameter_iterable
  File "C:\Anaconda3\lib\site-packages\sklearn\externals\joblib\parallel.py", line 800, in __call__
    while self.dispatch_one_batch(iterator):
  File "C:\Anaconda3\lib\site-packages\sklearn\externals\joblib\parallel.py", line 653, in dispatch_one_batch
    tasks = BatchedCalls(itertools.islice(iterator, batch_size))
  File "C:\Anaconda3\lib\site-packages\sklearn\externals\joblib\parallel.py", line 68, in __init__
    self.items = list(iterator_slice)
  File "C:\Anaconda3\lib\site-packages\sklearn\grid_search.py", line 549, in <genexpr>
    delayed(_fit_and_score)(clone(base_estimator), X, y, self.scorer_,
  File "C:\Anaconda3\lib\site-packages\sklearn\grid_search.py", line 223, in __iter__
    for v in self.param_distributions.values()])
AttributeError: 'list' object has no attribute 'values'


但是例如,执行Pipeline(lr_tfidf)不会出现任何问题:

lr_tfidf.fit(X_train, y_train)


可能是什么原因? X_train(text)和y_train(binary)是适当的(我想)numpy数组。

带有数据集的完整代码:
https://github.com/kuba2111/untitled12

最佳答案

在这里,您使用的是RandomizedSearchCV而不是GridSearchCV
因此,它似乎认为参数之一是分布,并尝试从该分布中进行抽样。

因此,如果可以使用GridSearchCV详尽搜索所有参数,则可以解决此问题。

python - RandomizedSearchCv导致属性错误-LMLPHP

关于python - RandomizedSearchCv导致属性错误,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/36488564/

10-09 03:05