Course 1 Week 3 predict() IndexError

Course Q&A Deep Learning Specialization Neural Networks and Deep Learning
1

Hi all,

I’m getting the below error in Exercise 9: Predict.

All my code has passed the exercise-specific tests but now it seems that W1 has changed data type to a list or array as it can’t be indexed using a string:

Can anyone help with this?

---------------------------------------------------------------------------
IndexError                                Traceback (most recent call last)
<ipython-input-22-eb08347ef392> in <module>
      1 parameters, t_X = predict_test_case()
      2 
----> 3 predictions = predict(parameters, t_X)
      4 print("Predictions: " + str(predictions))
      5 

<ipython-input-21-673ef527b78d> in predict(parameters, X)
     18     # predictions = ...
     19     # YOUR CODE STARTS HERE
---> 20     A2, cache = forward_propagation(parameters, X)
     21     predictions = np.round(A2)
     22     # YOUR CODE ENDS HERE

<ipython-input-11-02ac29b26417> in forward_propagation(X, parameters)
     18     # b2 = ...
     19     # YOUR CODE STARTS HERE
---> 20     W1 = parameters["W1"]
     21     b1 = parameters["b1"]
     22     W2 = parameters["W2"]

IndexError: only integers, slices (`:`), ellipsis (`...`), numpy.newaxis (`None`) and integer or boolean arrays are valid indices
2

Hi @Otto_Pauer, looks like you’re using forward_propagation(parameters, X) instead of forward_propagation(X, parameters)?

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