Python

wanna know why?? at line 68-73 you are checking that condition before adding the book first time you add the book length of borrowed books increases => 1 secomd time you add it becomes => 2 third time it becomes => 3 when fourth time you add the book, your condition checks if the length of borrowed books is *higher* than 3, but currently the length is 3 right now, so it adds the 4th book as well and length becomes => 4, but next time when try to add, the condition catches you and dosent let you add more. you should change that condition to either len(borrowed_books) == 3 or len(borrowed_books) >= 3