解决：'Tensor' object has no attribute 'numpy'

环境

• tensoflow >= 1.14 

制造错误：

import tensorflow as tf
m = tf.keras.metrics.Accuracy()
m.update_state([1, 2, 3, 4], [1, 2, 3, 4])
print('Final result: ', m.result().numpy()) 

错误：
 

AttributeError: 'Tensor' object has no attribute 'numpy'

解决方式：（版本1.14后才有的特性）

import tensorflow as tf
tf.enable_eager_execution() # 关键

m = tf.keras.metrics.Accuracy()
m.update_state([1, 2, 3, 4], [1, 2, 3, 4])
print('Final result: ', m.result().numpy())