I have complite all the excises,but when I submit, I get the 0 grades, and when I run the cells,I didn’t find the “Error” hints. Someone could give me some help?
What does the grader feedback say?
After I update , I submit again ,and have the same problem, here is the feedback ‘Cell #6. Can’t compile the student’s code. Error: TypeError("‘NoneType’ object is not iterable")’
The “NoneType” error implies that perhaps, somewhere in the notebook, you’ve left a “None” statement that needs to be replaced.