Failing unit test and zero grades in the programming assignment of Calculus, Week 3

Course Q&A Math for Machine Learning Calculus for Machine Learning and Data Science
1

I finished the programming assignment of the 3rd week of the calculus course and all the unit tests passed other than a single one. Moreover, I got 0 grades after submitting the assignment. The unit test which is failing gives me this error.

Test case "change_weights_check". Wrong output of Z1 for X = 
[[ 5.46584646  6.71120407  7.21301753 ...  1.77559174  3.52245562
   7.86492998]
 [ 2.91868287 10.31812597  7.79616824 ...  2.43434264  3.64044705
   6.77517917]]
Test for i = 1, j = 1999. 
	Expected: 
-0.03577862954823146
	Got: 
-0.03577862954823145
 47  Tests passed
 1  Tests failed

As you can see the only difference is in the last digit of the decimal. Instead of 6 I get 5 and I don’t know why. Furthermore, I can’t figure out why I am getting 0 grades. Can anyone help me with these two problems please?

** UPDATE 1: I may have found a solution to the issue with 0 grades. Awaiting new grading now.
** UPDATE 2: Problem with zero grades solved. I passed with 100. I’m guessing the unit test is wrong then?

3

"** UPDATE 2: Problem with zero grades solved. "
How?

4

@Abdullah_Q My problem was that in one of the questions the grading needed me to do an operation separately in two lines, exactly as a prior lab. But I had done it in one line. Pretty strange that it was causing a 0 grades issue as the rest was all good but fixing that resolved the issue.