tensorflow获取tensor形状

• tf.shape返回类型是Tensor，可以转换为list类型
• tensor.shape返回类型是TensorShape，无法转换为list类型，会报错

import tensorflow as tf

tensor = tf.constant([[1, 2, 3], [4, 5, 6], [7, 8, 9]])
shape_tensor = tf.shape(tensor)
# error: cannot convert TensorShape into Tensor or List
test = tensor.shape

# 在会话中运行以获取形状值
with tf.Session() as sess:
    shape_tensor_v = sess.run(shape_tensor)
    tensor_shape_list = shape_tensor_v.tolist()
    print("tensor shape:", tensor_shape_list)
#     test_value = sess.run(test)
#     print("test type: ", type(test_value))