Course 4, week 3, assignment 2, kernel restarts

Course Q&A Deep Learning Specialization Convolutional Neural Networks
1

All tests passed. However, when I try to run the code for training the model (4 - Train the Model) the kernel restarts after 30 sec. No error. I submitted the assignment without training (since all test cases were passed) the grader gave me 0.

2

The Kernel dies is a known issue and we are discussing this with Coursera. However, if your code is correct, you should pass the grader. What error/feedback grader give you?

3

Cell #3. Can’t compile the student’s code. Error: IndexError(‘list index out of range’)

I am assuming cell 3 is just to check out some masked and unmasked images. I didn’t add any code to it. And it (cell 3) runs perfectly on my machine.

4

The following hint in the notebook seems like it might be relevant to your situation. :nerd_face:

Check out the some of the unmasked and masked images from the dataset:

After you are done exploring, revert back to N=2. Otherwise the autograder will throw a list index out of range error.

5

Thanks! Felt really stupid :smiley:

6

If it’s any comfort, you are far from the first person to step on that landmine, which is why I recognized the scenario. Apparently the grader uses a much smaller dataset …

But there is a valuable lesson to be learned there: reading the instructions carefully may cost you a few more minutes, but it frequently can end up saving you a lot more time than that. :grinning:

7

Absolutely! I will try to increase the resolution of my perceptions and it will be computationally more expensive (will take a few more minutes).

Thanks a lot for taking the time to make this comment. I appreciate it!