Using ResNeXt in Keras 2.2.4

To use ResNeXt50, I wrote my code as the API documentation for Keras:

But it reported errors:

That’s weird. The code doesn’t work as documentation said.
So I checked the code of Keras-2.2.4 (the version in my computer), and noticed that this version of code use ‘keras_applications’ instead of ‘keras.applications’.
Then I changed my code:

But it reported another error:

Witout choice, I had to check code of ‘/usr/lib/python3.6/site-packages/keras_applications/’ too. Finally, I realise the ResNeXt50() function need three more arguments:

Now the program could run ResNeXt50 model correctly. This github issue explained the detail: the ‘keras_applications’ could be used both for Keras and Tensorflow, so it needs to pass library details into model function.

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