keras 使用经验

1. tensorflow.keras与keras：TypeError: objectof type 'xxx' has no len()
2. Module 'gast' has no attribute 'Num'
3. K.batch_dot 的版本变化
4. TypeError: 'range' object does not support item assignment

random_order = list(range(len(total_data)))  # range 返回的结果需要用list
np.random.shuffle(random_order)

5. TypeError: Using a tf.Tensor as a Python bool is not allowed.: v_in_dim = input_shape[2][-1].value 不加value，是一个 <class 'tensorflow.python.framework.tensor_shape.Dimension'> 类型的变量，需要加.value

import tensorflow as tf
from keras import backend as K
K.arange(K.shape(K.constant([1]))[0])

keras.backend.arange does not allow tensor start，要么使用keras，要么使用tf.range

6. [UnknownError: Failed to get convolution algorithm. This is probably because cuDNN failed to initialize, so try looking to see if a warning log message was printed above. [Op:Conv2D]]

# 加入下面这两行！
import os
os.environ['CUDA_VISIBLE_DEVICES'] = '/gpu:0'