我正在构建一个神经网络，并使用自定义损失函数（相当长且复杂）。我的网络是无监督的，因此我的输入和期望输出是相同的，而且目前我只使用单个输入（仅尝试为单个输入优化损失）。
我正在尝试使用tensorboard.plugins.hparams api进行超参数调整，并不知道如何在其中加入我的自定义损失函数。我正尝试按照Tensorflow 2.0 网站上建议的代码进行操作。
这是该网站的建议内容：
HP_NUM_UNITS = hp.HParam('num_units', hp.Discrete([16, 32]))
HP_DROPOUT = hp.HParam('dropout', hp.RealInterval(0.1, 0.2))
HP_OPTIMIZER = hp.HParam('optimizer', hp.Discrete(['adam', 'sgd']))
METRIC_ACCURACY = 'accuracy'
with tf.summary.create_file_writer('logs/hparam_tuning').as_default():
hp.hparams_config(
hparams=[HP_NUM_UNITS, HP_DROPOUT, HP_OPTIMIZER],
metrics=[hp.Metric(METRIC_ACCURACY, display_name='Accuracy')],
)
我需要进行更改，因为我不想使用dropout层，所以可以将其删除。关于METRIC_ACCURACY，我不想使用accuracy，因为它在我的模型中没有用处，而是使用自定义的损失函数。如果我要执行常规的fit model，则会像这样：
model.compile(optimizer=adam,loss=dl_tf_loss, metrics=[dl_tf_loss])
所以我尝试将建议的代码更改为以下代码，但是我遇到了一个错误，想知道我应该如何更改它以适合我的需求。这是我尝试过的内容：
HP_NUM_UNITS = hp.HParam('num_units', hp.Discrete([16, 32]))
HP_OPTIMIZER = hp.HParam('optimizer', hp.Discrete(['adam', 'sgd']))
#METRIC_LOSS = dl_tf_loss
with tf.summary.create_file_writer('logs/hparam_tuning').as_default():
hp.hparams_config(hparams=[HP_NUM_UNITS, HP_OPTIMIZER],metrics=
[hp.Metric(dl_tf_loss, display_name='Loss')])
它给我以下错误：
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-26-27d079c6be49> in <module>()
5
6 with tf.summary.create_file_writer('logs/hparam_tuning').as_default():
----> 7 hp.hparams_config(hparams=[HP_NUM_UNITS, HP_OPTIMIZER],metrics=[hp.Metric(dl_tf_loss, display_name='Loss')])
8
3 frames
/usr/local/lib/python3.6/dist-packages/tensorboard/plugins/hparams/summary_v2.py in hparams_config(hparams, metrics, time_created_secs)
127 hparams=hparams,
128 metrics=metrics,
--> 129 time_created_secs=time_created_secs,
130 )
131 return _write_summary("hparams_config", pb)
/usr/local/lib/python3.6/dist-packages/tensorboard/plugins/hparams/summary_v2.py in hparams_config_pb(hparams, metrics, time_created_secs)
161 domain.update_hparam_info(info)
162 hparam_infos.append(info)
--> 163 metric_infos = [metric.as_proto() for metric in metrics]
164 experiment = api_pb2.Experiment(
165 hparam_infos=hparam_infos,
/usr/local/lib/python3.6/dist-packages/tensorboard/plugins/hparams/summary_v2.py in <listcomp>(.0)
161 domain.update_hparam_info(info)
162 hparam_infos.append(info)
--> 163 metric_infos = [metric.as_proto() for metric in metrics]
164 experiment = api_pb2.Experiment(
165 hparam_infos=hparam_infos,
/usr/local/lib/python3.6/dist-packages/tensorboard/plugins/hparams/summary_v2.py in as_proto(self)
532 name=api_pb2.MetricName(
533 group=self._group,
--> 534 tag=self._tag,
535 ),
536 display_name=self._display_name,
TypeError: <tensorflow.python.eager.def_function.Function object at 0x7f9f3a78e5c0> has type Function, but expected one of: bytes, unicode
我也尝试运行了以下代码：
with tf.summary.create_file_writer('logs/hparam_tuning').as_default():
hp.hparams_config(hparams=[HP_NUM_UNITS, HP_OPTIMIZER],metrics=
[dl_tf_loss])
但是出现了以下错误：
AttributeError Traceback (most recent call last)
<ipython-input-28-6778bdf7f1b1> in <module>()
8
9 with tf.summary.create_file_writer('logs/hparam_tuning').as_default():
---> 10 hp.hparams_config(hparams=[HP_NUM_UNITS, HP_OPTIMIZER],metrics=[dl_tf_loss])
2 frames
/usr/local/lib/python3.6/dist-packages/tensorboard/plugins/hparams/summary_v2.py in <listcomp>(.0)
161 domain.update_hparam_info(info)
162 hparam_infos.append(info)
--> 163 metric_infos = [metric.as_proto() for metric in metrics]
164 experiment = api_pb2.Experiment(
165 hparam_infos=hparam_infos,
AttributeError: 'Function' object has no attribute 'as_proto'
我非常感谢您的帮助。 提前致谢！