C2W3: Assignment 3: Testing Data Quality with Great Expectations-Exercise2

I can not get past this assignment: I am getting this error on exercise 2: Failed test case: Incorrect output in ‘ex02’: Number of lines do not match. Expected: 9 lines, but got: 0 lines.

I am 100% sure i have tested my code and am getting the correct expected output. But when i submitt i get zero on that part. Please help..