W4_A1_submission output_ 0/100 when tests were passed

Which problem? The grader 0/100 problem or the initialize_parameters not defined problem?

If it’s the latter, you probably just forgot to run the earler cells in the notebook. Try “Cell → Run All Above” and then run the failing cell again. Note that you have to do that every time you close and reopen the notebook. There is a topic about that on the DLS FAQ Thread.

BTW This thread is almost 2 years old. You will generally have better luck opening a new thread rather than tacking onto an old one, even if the topic is similar.

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