Struggling with exercise 3 C1_W2

Hi everyone. my lab keeps on saying name error .
TypeError Traceback (most recent call last)
8 ### END CODE HERE ###
—> 10 print(f"Determinant of matrix A: {d:.2f}“)
12 print(f"Solution vector: {x}”)

TypeError: unsupported format string passed to NoneType.format

Hello @Sdumo_LuckySibiya,

The determinant d is None, therefore python is breaking when trying to round it here:

print(f"Determinant of matrix A: {d:.2f}“)

Please check how you are computing the determinant d.


everything in my notebook says the same thing. I havent attempted question 5 and six but when I run them they give me the same erro as the ones I did so um now confused

Can you share your Lab ID with me?

In the assignment, when you click the top right “Help” button, a panel will open and your lab ID will be shown at the bottom.

I will take a look to check what os going on.

Thnks I got it. I had to refresh the notebook
Now im having a problem in exercise 4 when I insert the codes the A_ref doesnt change. I doont know what is it that um doing wrong because I can insert the codes down the end but nochanges to A_ref

moderator edit - solution block removed

Hi @Sdumo_LuckySibiya,

Please avoid posting solutions to exercises, because this goes against our Community Guidelines. When you have to do that, please do so as a DM. Thanks!

As I could see in your solution, you haven’t finished to replace all the None values assigned to A_ref so that’s why when you run the code, nothing happens, because change to A_ref is replaced by None


oky sorry about that. I will use the DM