我正在尝试使用hypopt执行多分类任务的GridSearch
param_grid = [{'C': [1, 10, 100], 'penalty' :['l2']}]
gs = GridSearch(model = LogisticRegression(multi_class='multinomial'), param_grid = param_grid)
gs.fit(X_train, y_train, X_val, y_val, scoring='f1_macro')
如果不指定评分函数,它将按预期运行。但是,当我指定评分函数时,例如“f1_宏”,我得到以下错误:
0%| | 0/3 [00:00<?, ?it/s]/usr/local/lib/python3.6/dist-packages/sklearn/linear_model/_logistic.py:940: ConvergenceWarning: lbfgs failed to converge (status=1):
STOP: TOTAL NO. of ITERATIONS REACHED LIMIT.
Increase the number of iterations (max_iter) or scale the data as shown in:
https://scikit-learn.org/stable/modules/preprocessing.html
Please also refer to the documentation for alternative solver options:
https://scikit-learn.org/stable/modules/linear_model.html#logistic-regression
extra_warning_msg=_LOGISTIC_SOLVER_CONVERGENCE_MSG)
/usr/local/lib/python3.6/dist-packages/hypopt/model_selection.py:174: UserWarning: ERROR in thread<NoDaemonProcess(NoDaemonPoolWorker-59, started)>with exception:
module 'sklearn.metrics' has no attribute 'scorer'
warnings.warn('ERROR in thread' + pname + "with exception:\n" + str(e))
33%|███▎ | 1/3 [00:13<00:26, 13.21s/it]/usr/local/lib/python3.6/dist-packages/sklearn/linear_model/_logistic.py:940: ConvergenceWarning: lbfgs failed to converge (status=1):
STOP: TOTAL NO. of ITERATIONS REACHED LIMIT.
Increase the number of iterations (max_iter) or scale the data as shown in:
https://scikit-learn.org/stable/modules/preprocessing.html
Please also refer to the documentation for alternative solver options:
https://scikit-learn.org/stable/modules/linear_model.html#logistic-regression
extra_warning_msg=_LOGISTIC_SOLVER_CONVERGENCE_MSG)
/usr/local/lib/python3.6/dist-packages/hypopt/model_selection.py:174: UserWarning: ERROR in thread<NoDaemonProcess(NoDaemonPoolWorker-60, started)>with exception:
module 'sklearn.metrics' has no attribute 'scorer'
warnings.warn('ERROR in thread' + pname + "with exception:\n" + str(e))
67%|██████▋ | 2/3 [00:13<00:09, 9.30s/it]/usr/local/lib/python3.6/dist-packages/sklearn/linear_model/_logistic.py:940: ConvergenceWarning: lbfgs failed to converge (status=1):
STOP: TOTAL NO. of ITERATIONS REACHED LIMIT.
Increase the number of iterations (max_iter) or scale the data as shown in:
https://scikit-learn.org/stable/modules/preprocessing.html
Please also refer to the documentation for alternative solver options:
https://scikit-learn.org/stable/modules/linear_model.html#logistic-regression
extra_warning_msg=_LOGISTIC_SOLVER_CONVERGENCE_MSG)
/usr/local/lib/python3.6/dist-packages/hypopt/model_selection.py:174: UserWarning: ERROR in thread<NoDaemonProcess(NoDaemonPoolWorker-59, started)>with exception:
module 'sklearn.metrics' has no attribute 'scorer'
warnings.warn('ERROR in thread' + pname + "with exception:\n" + str(e))
100%|██████████| 3/3 [00:19<00:00, 6.59s/it]
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-102-2a8cb30a1d8d> in <module>()
7 # Grid-search all parameter combinations using a validation set.
8 gs = GridSearch(model = LogisticRegression(multi_class='multinomial'), param_grid = param_grid)
----> 9 gs.fit(X_train, y_train, X_val, y_val, scoring='f1_macro')
10
/usr/local/lib/python3.6/dist-packages/hypopt/model_selection.py in fit(self, X_train, y_train, X_val, y_val, scoring, scoring_params, verbose)
361 else:
362 results = [_run_thread_job(job) for job in params]
--> 363 models, scores = list(zip(*results))
364 self.model = models[np.argmax(scores)]
365 else:
ValueError: not enough values to unpack (expected 2, got 0)
通过采取以下措施,也可以很容易地再现错误
X_train = np.array([[1, 2, 3], [3, 4, 5], [1, 2, 3]])
X_val = X_train
y_train = [1,0,2]
y_val = y_train
不知道发生了什么事
我用
sklearn.__version__
>> 0.22.2.post1
hypopt.__version__
>> 1.0.9
hypopt
和sklearn
版本之间存在兼容性问题,错误消息是不言自明的我有:
我确实犯了和你一样的错误。原因是以下source代码:
将
metrics.scorer
更改为metrics._scorer
,因为这是sklearn v.23.1
所期望的,您可以去证明:
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