Home/Questions/Amazing Solutions For valueerror: object arrays cannot be loaded when allow_pickle=false Error
Next
Answered
Gabin Raynaud
  • 25
Asked: 2022-05-11T19:10:35+00:00 In:

Amazing Solutions For valueerror: object arrays cannot be loaded when allow_pickle=false Error

  • 25

I get the error: valueerror: object arrays cannot be loaded when allow_pickle=false when I try to run the program below:

from keras.datasets import imdb
 (train_data, train_labels), (test_data, test_labels) = imdb.load_data(num_words=10000)

The error appears the system notifies as follows:

ValueError Traceback (most recent call last)
 <ipython-input-1-2ab3902db485> in <module>()
  1 from keras.datasets import imdb
 ----> 2 (train_data, train_labels), (test_data, test_labels) = imdb.load_data(num_words=10000)
 
 2 frames
 /usr/local/lib/python3.6/dist-packages/keras/datasets/imdb.py in load_data(path, num_words, skip_top, maxlen, seed, start_char, oov_char, index_from, **kwargs)
  57 file_hash='599dadb1135973df5b59232a0e9a887c')
  58 with np.load(path) as f:
 ---> 59 x_train, labels_train = f['x_train'], f['y_train']
  60 x_test, labels_test = f['x_test'], f['y_test']
  61 
 
 /usr/local/lib/python3.6/dist-packages/numpy/lib/npyio.py in __getitem__(self, key)
  260 return format.read_array(bytes,
  261 allow_pickle=self.allow_pickle,
 --> 262 pickle_kwargs=self.pickle_kwargs)
  263 else:
  264 return self.zip.read(key)
 
 /usr/local/lib/python3.6/dist-packages/numpy/lib/format.py in read_array(fp, allow_pickle, pickle_kwargs)
  690 # The array contained Python objects. We need to unpickle the data.
  691 if not allow_pickle:
 --> 692 raise ValueError("Object arrays cannot be loaded when "
  693 "allow_pickle=False")
  694 if pickle_kwargs is None:
 
 ValueError: Object arrays cannot be loaded when allow_pickle=False

I tried to solve it with another sample. I got the reference in the community forum, but it still returned an invalid result. If someone knows the solution, please give me the support. Thanks!

object arrays cannot be loaded
Share

2 Answers

  1. Best Answer
    Expert

    The cause: The error can occur due to the following reasons: Saving a python list of numpy arrays that used np.save and then it is loaded with np.load. Therefore, imdb.load_data didn’t allow pickle.

    Solution: You should do this way to compel imdb.load_data to permit pickle.

    Change:

    (train_data, train_labels), (test_data, test_labels) = imdb.load_data(num_words=10000)

    into:

    import numpy as np
# save np.load
np_load_old = np.load

# modify the default parameters of np.load
np.load = lambda *a,**k: np_load_old(*a, allow_pickle=True, **k)

# call load_data with allow_pickle implicitly set to true
(train_data, train_labels), (test_data, test_labels) = imdb.load_data(num_words=10000)

# restore np.load for future normal usage
np.load = np_load_old
    👇️ Read more: Fixing “ValueError: Object arrays cannot be loaded when allow_pickle=False”
    • 17

  2. This issue “valueerror: object arrays cannot be loaded” is still on keras Git. It will be resolved as soon as possible, I hope you can try to downgrade your numpy version until then to 1.16.2. This seems to fix the problem.

    !pip install numpy==1.16.1
import numpy as np

    This version of numpy uses the default allow_pickle value as True.

    • 13

Leave an answer

You must login to add an answer.

Need An Account,