I’ve finished all the assignments and the grader says it’s all correct. But the line “model.summary()” shows the error: ValueError: This model has not yet been built. Build the model first by calling 'build()' or by calling the model on a batch of data.

Hi! @slava.t Have you tried adding a tf.keras.Input layer to your model? or adding an input_shape argument to the first layer of the model? Without information about the input TensorFlow has no way to know what the Shape of the input data is going to look like and cannot create the model until it …

C2_W2_Assignment Practice Lab error: This model has not yet been built

Course Q&A Machine Learning Specialization Advanced Learning Algorithms

rgaston November 18, 2022, 7:07pm 9

This worked to resolve the error, but I agree that this step was not clear at all. It also required adding “Input” to the import from Keras models line in the first executable cell in the notebook.

1 Like

When should I specify the input shape?

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C2_W2_Assignment Practice Lab error: This model has not yet been built

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