Created by: txyugood

我在finetune 分类模型时，自定义了数据集。在训练过程中评估模型的时候会报错：

File "/Users/alex/baidu/paddlehubdog/train.py", line 71, in <module>
   task.finetune_and_eval()
 File "/Users/alex/.conda/envs/paddle/lib/python3.6/site-packages/paddlehub/finetune/task/basic_task.py", line 592, in finetune_and_eval
   return self.finetune(do_eval=True)
 File "/Users/alex/.conda/envs/paddle/lib/python3.6/site-packages/paddlehub/finetune/task/basic_task.py", line 604, in finetune
   run_states = self._run(do_eval=do_eval)
 File "/Users/alex/.conda/envs/paddle/lib/python3.6/site-packages/paddlehub/finetune/task/basic_task.py", line 648, in _run
   return self._run_with_py_reader(do_eval=do_eval)
 File "/Users/alex/.conda/envs/paddle/lib/python3.6/site-packages/paddlehub/finetune/task/basic_task.py", line 743, in _run_with_py_reader
   self._eval_interval_event()
 File "/Users/alex/.conda/envs/paddle/lib/python3.6/site-packages/paddlehub/finetune/task/basic_task.py", line 534, in _eval_interval_event
   self.eval(phase="dev")
 File "/Users/alex/.conda/envs/paddle/lib/python3.6/site-packages/paddlehub/finetune/task/basic_task.py", line 628, in eval
   run_states = self._run()
 File "/Users/alex/.conda/envs/paddle/lib/python3.6/site-packages/paddlehub/finetune/task/basic_task.py", line 648, in _run
   return self._run_with_py_reader(do_eval=do_eval)
 File "/Users/alex/.conda/envs/paddle/lib/python3.6/site-packages/paddlehub/finetune/task/basic_task.py", line 708, in _run_with_py_reader
   self.py_reader.decorate_paddle_reader(self.reader)
 File "/Users/alex/.conda/envs/paddle/lib/python3.6/site-packages/paddlehub/finetune/task/basic_task.py", line 391, in reader
   batch_size=self.config.batch_size, phase=self.phase, data=data)
 File "/Users/alex/.conda/envs/paddle/lib/python3.6/site-packages/paddlehub/reader/cv_reader.py", line 92, in data_generator
   self.num_examples['dev'] = len(self.get_dev_examples())
 File "/Users/alex/.conda/envs/paddle/lib/python3.6/site-packages/paddlehub/reader/cv_reader.py", line 136, in get_dev_examples
   return self.dataset.dev_examples
AttributeError: 'MyDataSet' object has no attribute 'dev_examples'

我发现ImageClassificationDataset代码中有：

    def test_data(self, shuffle=False):
        test_data_path = os.path.join(self.base_path, self.test_list_file)
        return self._parse_data(test_data_path, shuffle, phase='dev')

    def validate_data(self, shuffle=False):
        validate_data_path = os.path.join(self.base_path,
                                          self.validate_list_file)
        return self._parse_data(validate_data_path, shuffle, phase='test')

这两个方法的 phase 的值是不是设置错了？ 我在自定义的 Dataset中，重写这个两个方法，同时将 phase 的值调换，程序可以正常运行。