假设您使用的是 Tensorflow 2.0 预览版，它默认启用了 Eager Execution.v1 API 中有一个 disable_eager_execution()，你可以把它放在你的代码前面，比如:

Assume you are using Tensorflow 2.0 preview release which has eager execution enabled by default. There is a disable_eager_execution() in v1 API, which you can put in the front of your code like:

import tensorflow as tf

tf.compat.v1.disable_eager_execution()

另一方面，如果您没有使用 2.0 预览版，请检查您是否不小心在某处启用了 Eager Execution.

On the other hand, if you are not using 2.0 preview, please check if you accidentally enabled eager execution somewhere.