keras使用callbacks后报错：tensorflow.python.framework.errors_impl.NotFoundError: Failed to create a direct

参考：https://stackoverflow.com/questions/59439124/keras-tuner-search-function-throws-failed-to-create-a-newwriteablefile-error/60448427#60448427

解决方法：

1.保存log的路径太长，改短
2.log的路径中不要’/’ '\'混着用

修改后：

log_dir = r'.\\log\\'  # 只改了这里

...#中间其它代码

tensorboard = TensorBoard(log_dir = log_dir)
checkpoint = ModelCheckpoint