AttributeError：启用急切执行时，Tensor.name无意义

Question

在tensorflow 2.0中进行基本优化：

import tensorflow as tf
import numpy as np

x = tf.constant(3.0)
with tf.GradientTape() as t:
    t.watch(x)
    y = (x - 10) ** 2
opt = tf.optimizers.Adam()
opt.minimize(lambda: y, var_list=[x])