Python model.compile（）在除'；准确度'；米制的

我正在编写一个简单的MLP，并编写了以下代码：

from keras.models import Sequential
from keras.layers import Dense
from keras import Input

def get_stats_model():

    model = Sequential()
    model.add(Dense(12, input_dim=8, activation='relu'))
    model.add(Dense(8, activation='relu'))
    model.add(Dense(1, activation='sigmoid'))
    model.compile(loss='binary_crossentropy', optimizer='adam', metrics=['accuracy'])
    
    return model

在

main.py

中：

get_stats_model()

Wich可以完美地工作，只要度量标准仅为

“准确性”

。当同时使用

'accurity'

和

'AUC'

进行尝试时，只需使用

'AUC'

或

'mean_absolute_error'

，例如：

from keras.models import Sequential
from keras.layers import Dense
from keras import Input

def get_stats_model():

    model = Sequential()
    model.add(Dense(12, input_dim=8, activation='relu'))
    model.add(Dense(8, activation='relu'))
    model.add(Dense(1, activation='sigmoid'))
    model.compile(loss='binary_crossentropy', optimizer='adam', metrics=['AUC'])
    
    return model

我得到以下错误：

Traceback (most recent call last):
  File "main.py", line 4, in <module>
    get_stats_model()
  File "/home/giuliano/Desktop/tfg/workspace/root/final/exp/mlp.py", line 64, in get_stats_model
    model.compile(loss='binary_crossentropy', optimizer='adam', metrics=['AUC'])
  File "/home/giuliano/anaconda3/envs/tfg/lib/python3.7/site-packages/keras/backend/tensorflow_backend.py", line 75, in symbolic_fn_wrapper
    return func(*args, **kwargs)
  File "/home/giuliano/anaconda3/envs/tfg/lib/python3.7/site-packages/keras/engine/training.py", line 222, in compile
    masks=masks)
  File "/home/giuliano/anaconda3/envs/tfg/lib/python3.7/site-packages/keras/engine/training.py", line 871, in _handle_metrics
    self._per_output_metrics[i], target, output, output_mask)
  File "/home/giuliano/anaconda3/envs/tfg/lib/python3.7/site-packages/keras/engine/training.py", line 842, in _handle_per_output_metrics
    metric_fn, y_true, y_pred, weights=weights, mask=mask)
  File "/home/giuliano/anaconda3/envs/tfg/lib/python3.7/site-packages/keras/engine/training_utils.py", line 1033, in call_metric_function
    update_ops = metric_fn.update_state(y_true, y_pred, sample_weight=weights)
  File "/home/giuliano/anaconda3/envs/tfg/lib/python3.7/site-packages/keras/utils/metrics_utils.py", line 42, in decorated
    update_op = update_state_fn(*args, **kwargs)
  File "/home/giuliano/anaconda3/envs/tfg/lib/python3.7/site-packages/keras/metrics.py", line 318, in update_state
    matches = self._fn(y_true, y_pred, **self._fn_kwargs)
  File "/home/giuliano/anaconda3/envs/tfg/lib/python3.7/site-packages/keras/metrics.py", line 1660, in __init__
    if num_thresholds <= 1:
  File "/home/giuliano/anaconda3/envs/tfg/lib/python3.7/site-packages/tensorflow_core/python/framework/ops.py", line 757, in __bool__
    self._disallow_bool_casting()
  File "/home/giuliano/anaconda3/envs/tfg/lib/python3.7/site-packages/tensorflow_core/python/framework/ops.py", line 526, in _disallow_bool_casting
    self._disallow_in_graph_mode("using a `tf.Tensor` as a Python `bool`")
  File "/home/giuliano/anaconda3/envs/tfg/lib/python3.7/site-packages/tensorflow_core/python/framework/ops.py", line 515, in _disallow_in_graph_mode
    " this function with @tf.function.".format(task))
tensorflow.python.framework.errors_impl.OperatorNotAllowedInGraphError: using a `tf.Tensor` as a Python `bool` is not allowed in Graph execution. Use Eager execution or decorate this function with @tf.function.

提前感谢。

来自评论

创建

虚拟环境

和

导入Keras

使用tensorflow导入Keras的

代码

解决了这个问题。（摘自drops和Aniket Bote）

---

我有相同的tensorflow版本，但我的keras版本是2.2.4；对我来说，你的代码适用于各种度量单位它适用于我。我有相同的keras版本2.3.1。在新的虚拟环境中，我有一个建议。安装软件包并尝试代码。其次，您可以尝试从tensorflow本身导入keras。例如，tensorflow.keras的

导入稠密

，这两种方法都解决了问题。

Keras==2.3.1
tensorflow==2.1.0