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Question

当我试图在Jupyter笔记本中运行NiftyNet Promise12演示的推断部分时，我得到了以下错误。你知道吗

   AttributeError                            Traceback (most recent call last)
<ipython-input-3-f9444ce4ad73> in <module>()
      3 import niftynet
      4 sys.argv=['', 'inference','-a','net_segment','--conf',os.path.join('demos','PROMISE12','promise12_demo_inference_config.ini')]
----> 5 niftynet.main()

~/BI/NN/NiftyNet/niftynet/__init__.py in main()
    118     app_driver = ApplicationDriver()
    119     app_driver.initialise_application(system_param, input_data_param)
--> 120     app_driver.run_application()
    121     return 0

~/BI/NN/NiftyNet/niftynet/engine/application_driver.py in run_application(self)
    254             # start samplers' threads
    255             self._run_sampler_threads(session=session)
--> 256             self.graph = self._create_graph(self.graph)
    257 
    258             # check app variables initialised and ready for starts

~/BI/NN/NiftyNet/niftynet/engine/application_driver.py in _create_graph(self, graph)
    330                         self.app.connect_data_and_network(
    331                             self.outputs_collector,
--> 332                             self.gradients_collector)
    333                         if self.is_training:
    334                             # batch norm statistics from the last device

~/BI/NN/NiftyNet/niftynet/application/segmentation_application.py in connect_data_and_network(self, outputs_collector, gradients_collector)
    288             grads = self.optimiser.compute_gradients(loss)
    289             # collecting gradients variables
--> 290             gradients_collector.add_to_collection([grads])
    291             # collecting output variables
    292             outputs_collector.add_to_collection(

    AttributeError: 'NoneType' object has no attribute 'add_to_collection'

我目前正在使用Python3.4和Tensorflow 1.4.1。我该怎么解决这个问题？你知道吗

Answer 1

在笔记本中的niftynet.main()调用之后，应用程序状态未正确清除。在每次niftynet.main()之后重新启动内核可以避免这个问题。它在最新版本的NiftyNet中也被修复了。谢谢！你知道吗