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

TensorFlow General Discussion
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import numpy as np
import pandas as pd
import tensorflow as tf
import tensorflow_datasets as tfds
from tensorflow import keras
from tensorflow.keras.applications.resnet50 import ResNet50
from tensorflow.keras.models import Model    
(stl_train, stl_test, stl_unlabelled), ds_info = tfds.load('stl10',split=['train','test','unlabelled'],shuffle_files=True,as_supervised=True,with_info=True)
base_model = ResNet50(input_shape=ds_info.features['image'].shape,weights=None)
def reshapeImage(image, label):
  return tf.reshape(image, (1,96,96,3)), tf.convert_to_tensor(onehot_encoded[label.numpy()])
stl_train = stl_train.map(reshapeImage, num_parallel_calls=tf.data.experimental.AUTOTUNE)

The labels are tf.Tensor(4, shape=(), dtype=int64) ,I want the 4, in this example, which I will be using to convert into one-hot encoded labels, but I am unable to do so

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Have you tried to use set_shape in your reshapeImage function?

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tf.convert_to_tensor(onehot_encoded[label.numpy()])

The problem is actually in this part of the return statement. If I simply keep the labels as categorical numbers, it works, but then I will be having problems with softmax

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Update: it worked with stl_train = stl_train.map(lambda x, y: (x, tf.one_hot(integer_encoded,depth=10)[y]))
Can you explain why it did ? y is literally a tensor!

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It was not clear in the original code gist what is onehot_encoded

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onehot_encoded is a numpy array generated from sklearn.preprocessing.OneHotEncoder

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I’ve ran in to similar problems before when part of the input is not a Tensor. I think tf.data builds a graph and might have problems with NumPy arrays. What happens if you wrap your function in tf.numpy_function: tf.numpy_function  |  TensorFlow v2.16.1

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12

Yes you cannot use .numpy as you are in graph mode there.

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