Cannot import to_categorical from keras in Google Colab

user_14857189 0
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So i have been working on a notebook on Google Colab, and all of a sudden i get the following error.

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-1-bd6ec74ccf2e> in <module>()
----> 1 from keras.utils import to_categorical

ImportError: cannot import name 'to_categorical' from 'keras.utils' (/usr/local/lib/python3.7/dist-packages/keras/utils/__init__.py)

---------------------------------------------------------------------------
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It's very strange since it was working just fine, and when i restarted my session, this happened. I tried with another google account too (in case there might be something wrong with my account's setup), but i still got the same error.

This is what i use to import the function.

from keras.utils import to_categorical

I'm wondering if anything change, and if anyone else experiences the same issue. Thanks.

google-colaboratory keras python
3 Answers

from TF 2.0, it's been moved with tensorflow. please use this way:

from tensorflow.keras.utils import to_categorical
to_categorical([0, 1, 2, 3], num_classes=4)

result will be like

array([[1., 0., 0., 0.],
       [0., 1., 0., 0.],
       [0., 0., 1., 0.],
       [0., 0., 0., 1.]], dtype=float32)
user_155685040 
import tensorflow as tf

y_train_one_hot = tf.keras.utils.to_categorical(y_train)
user_160424100 
from keras.utils import to_categorical

remove this line from your code and use this

from tensorflow.keras.utils import to_categorical

this will solve your problem

user_147373690
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