Course 2 Assignment 3 Exercise 5 - Forward Propagation Error

Course Q&A Deep Learning Specialization Improving Deep Neural Networks: Hyperparameter tun
1

Hi, I don’t think my code has any problems, but it shows an error message of “Output does not match”. Please look into the attachment for further details. Thank you so much for your time and help.

[code removed - moderator]

Output
Output1118×760 62.7 KB

new_train
new_train996×128 3.09 KB

2

The code in your post is correct. Please click my name and message your notebook as an attachment. I want to confirm if any other cell has changed.

3

If you are using a tensorflow version other than 2.3 you will get wrong values.

e.g. using tensorflow version 2.8 I get:

tf.Tensor(
[[-1.6990757  -1.8013326 ]
 [ 0.6480478   0.599451  ]
 [ 1.0591697   0.6126361 ]
 [-1.448843   -1.3232949 ]
 [-0.6428431  -1.0289742 ]
 [ 1.4259917   0.86040926]], shape=(6, 2), dtype=float32)
---------------------------------------------------------------------------
AssertionError                            Traceback (most recent call last)
C:\Users\JAIMEG~1\AppData\Local\Temp/ipykernel_45712/4289173325.py in <module>
     18     print("\033[92mAll test passed")
     19 
---> 20 forward_propagation_test(forward_propagation, new_train)

C:\Users\JAIMEG~1\AppData\Local\Temp/ipykernel_45712/4289173325.py in forward_propagation_test(target, examples)
      6         assert type(forward_pass) == EagerTensor, "Your output is not a tensor"
      7         assert forward_pass.shape == (6, 2), "Last layer must use W3 and b3"
----> 8         assert np.allclose(forward_pass, 
      9                             [[-0.13430887,  0.14086473],
     10                              [ 0.21588647, -0.02582335],

AssertionError: Output does not match

but using tensorflow version 2.3 (preinstalled in coursera notebook provided ) I get the correct answer with all tests passed

4

Thanks for the notebook, @m4nual. Please execute your notebook in coursera environment for correct results. Your code for random_mini_batches passes the tests.
If you want to try things out on non-coursera environment, I recommend you ensure that dependencies are accounted for.
coursera runs numpy version 1.18.4.

For instance, you could do the following:

import numpy as np
print(np.__version__)
5

Got it. Thank you so much.

6

Hi @m4nual

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Welcome to the community :slight_smile: