SuprSonicJetBoy's blog

いろいろです。

GPyOpt が最初のサンプルで動かない場合

GPyOpt を試していたのですが、最初のサンプルでいきなりコケたので、その解決方法のメモ。

もくじ

環境

* Windows 10  
* Python 3.5  
* GPyOpt v1.0.3  

エラー内容

とてもシンプルなコードでエラー。
sheffieldml.github.io

C:\>python gpyopt_test.py
Traceback (most recent call last):
  File "gpyopt_test.py", line 11, in <module>
    myBopt.run_optimization(max_iter=15)
  File "C:\Users\ssjb\AppData\Local\Programs\Python\Python35\lib\site-packages\GPyOpt\methods\bayesian_optimization.py", line 458, in run_optimization
    super(BayesianOptimization, self).run_optimization(max_iter = max_iter, max_time = max_time,  eps = eps, verbosity=verbosity, save_models_parameters = save_models_parameters, report_file = report_file, evaluations_file= evaluations_file, models_file=models_file)
  File "C:\Users\ssjb\AppData\Local\Programs\Python\Python35\lib\site-packages\GPyOpt\core\bo.py", line 103, in run_optimization
    self._update_model()
  File "C:\Users\ssjb\AppData\Local\Programs\Python\Python35\lib\site-packages\GPyOpt\core\bo.py", line 198, in _update_model
    self._save_model_parameter_values()
  File "C:\Users\ssjb\AppData\Local\Programs\Python\Python35\lib\site-packages\GPyOpt\core\bo.py", line 209, in _save_model_parameter_values
    if self.model_parameters_iterations == None:
ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

解決方法

GPyOpt/core/bo.py の209行目を修正します。

def _save_model_parameter_values(self):
-    if self.model_parameters_iterations == None:
+    if self.model_parameters_iterations is None:
        self.model_parameters_iterations = self.model.get_model_parameters()

None の比較は、== ではなく、 is を使いましょう。

sheffieldml.github.io