Google Colab 上的错误运行 autokeras 图像分类器教程

Question

autokeras教程在这里https://colab.research.google.com/github/keras-team/autokeras/blob/master/docs/templates/tutorial/image_classification.ipynb

在线失败：

import autokeras as ak

# Initialize the image classifier.
clf = ak.ImageClassifier(max_trials=10) # It tries 10 different models.
# Feed the image classifier with training data.
clf.fit(x_train, y_train,epochs=3)

错误：

AttributeError: in user code:

    /usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/engine/training.py:503 train_function  *
        outputs = self.distribute_strategy.run(
    /usr/local/lib/python3.6/dist-packages/tensorflow/python/distribute/distribute_lib.py:951 run  **
        return self._extended.call_for_each_replica(fn, args=args, kwargs=kwargs)
    /usr/local/lib/python3.6/dist-packages/tensorflow/python/distribute/distribute_lib.py:2290 call_for_each_replica
        return self._call_for_each_replica(fn, args, kwargs)
    /usr/local/lib/python3.6/dist-packages/tensorflow/python/distribute/distribute_lib.py:2649 _call_for_each_replica
        return fn(*args, **kwargs)
    /usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/engine/training.py:475 train_step  **
        self.compiled_metrics.update_state(y, y_pred, sample_weight)
    /usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/engine/compile_utils.py:386 update_state
        self._build(y_pred, y_true)
    /usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/engine/compile_utils.py:317 _build
        self._metrics, y_true, y_pred)
    /usr/local/lib/python3.6/dist-packages/tensorflow/python/util/nest.py:1118 map_structure_up_to
        **kwargs)
    /usr/local/lib/python3.6/dist-packages/tensorflow/python/util/nest.py:1214 map_structure_with_tuple_paths_up_to
        *flat_value_lists)]
    /usr/local/lib/python3.6/dist-packages/tensorflow/python/util/nest.py:1213 <listcomp>
        results = [func(*args, **kwargs) for args in zip(flat_path_list,
    /usr/local/lib/python3.6/dist-packages/tensorflow/python/util/nest.py:1116 <lambda>
        lambda _, *values: func(*values),  # Discards the path arg.
    /usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/engine/compile_utils.py:416 _get_metric_objects
        return [self._get_metric_object(m, y_t, y_p) for m in metrics]
    /usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/engine/compile_utils.py:416 <listcomp>
        return [self._get_metric_object(m, y_t, y_p) for m in metrics]
    /usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/engine/compile_utils.py:437 _get_metric_object
        y_t_rank = len(y_t.shape.as_list())

    AttributeError: 'tuple' object has no attribute 'shape'

这是代码错误还是 Google Colab 设置错误？

Answer 1

问题不在于代码，我自己在本地机器上尝试过，它运行良好。真正的问题是这一行

pip install tensorflow

这一行让 pip 完全负责选择要安装的 tensorflow 版本，遗憾的是它选择安装 rc 版本 tensorflow-2.2.0rc1，这看起来 autokeras 有问题。

所以你要做的就是将版本修复为已知可与 autokeras

一起使用的最新稳定 tensorflow verison

pip install tensorflow==2.1.0

Answer 2

您也不需要再次安装 TensorFlow 2.1。

您可以 select 只需调用：

%tensorflow_version 2.x

Answer 3

pip install tensorflow==2.1.0 和 %tensorflow_version 2.x 都没有帮助我。我仍然遇到同样的错误。

您需要完全符合上面接受的答案中提到的 2.1 版本才能消除错误。

我正在使用 Google Colab

Answer 4

我有 TF 2.1.0，但仍然有同样的错误。代码运行在我的机器上但在 google colab

上没有

Google Colab 上的错误运行 autokeras 图像分类器教程

Error Running autokeras Image Classifier Tutorial on Google Colab

python

keras

google-colaboratory

auto-keras

Google Colab 上的错误 运行 autokeras 图像分类器教程

Error Running autokeras Image Classifier Tutorial on Google Colab

python

keras

google-colaboratory

auto-keras

Google Colab 上的错误运行 autokeras 图像分类器教程