The error message suggests that Python f string formatting doesn’t support numpy arrays. I took a fast read through the string formatting doc and didn’t find anywhere that said it does or doesn’t but maybe I missed it?
I did find this …although some of the formatting options are only supported by the numeric types…
Perhaps instead consider incorporating
https://numpy.org/doc/stable/reference/generated/numpy.array2string.html
@gent.spah sir please help me out from this problem
f_wb must be a scaler value.
Which is probably what was wrong in the first error, too. It wasn’t that the string formatting was incorrect, it was that the type of cost
was incorrect; it shouldn’t have been an array.