Correct answer invalidated

https://www.codecademy.com/workspaces/65e1b8a36065876fd2dc4d61

What is the course or lesson that this is associated with?

https://www.codecademy.com/courses/learn-python-3/lessons/learn-python-files/exercises/reading-different-csvs

There are some errors in the OP’s code submission. The printed output should look like ths:

['978-0-12-995015-8', '978-1-78110-100-1', '978-0-315-25137-3', '978-0-388-70665-7', '978-1-75098-721-6', '978-1-06-483628-6', '978-0-7419-8114-1', '978-1-4457-0480-7', '978-0-657-61030-2', '978-1-5039-7539-2']

Here is the OP’s code:

import csv

with open("books.csv") as books_csv:
  books_reader = csv.DictReader(books_csv, delimiter = "@")
  isbn_list = []

  for isbn in books_reader:
    isbn_list = isbn["ISBN"]
    print(isbn_list)