class, __init__, self — the three keywords AI uses every time (step 9/9) · classes

Checkpoint

One last thing before we move on. Same surface as a write step — but the lesson doesn't complete until this passes.

AI handed you the skeleton of a Cart class. The __init__ and add methods are wired correctly. Your job: finish the total method so it returns the sum of all prices currently in self.items.

Expected output:

Checkpoint

One last thing before we move on. Same surface as a write step — but the lesson doesn't complete until this passes.

AI handed you the skeleton of a Cart class. The __init__ and add methods are wired correctly. Your job: finish the total method so it returns the sum of all prices currently in self.items.

Expected output:

full-screen editor opens — close anytime to keep reading.

class, __init__, self — the three keywords AI uses every time — step 9 of 9

class, init, self — the three keywords AI uses every time — step 9 of 9