“Could not interpret optimizer identifier” error in Keras

Question

I got this error when I tried to modify the learning rate parameter of SGD optimizer in Keras. Did I miss something in my codes or my Keras was not installed properly?

Answer 1

from tensorflow.keras.optimizers import SGD

This works well.

Since Tensorflow 2.0, there is a new API available directly via tensorflow:

• https://www.pyimagesearch.com/2019/10/21/keras-vs-tf-keras-whats-the-difference-in-tensorflow-2-0/

Solution works for tensorflow==2.2.0rc2, Keras==2.2.4 (on Win10)

Please also note that the version above uses learning_rate as parameter and no longer lr.