[Tutor] associating two objects without ORM and processing a text file

[Steven D'Aprano]

On 13/02/13 04:32, neubyr wrote:

> I am not following your comment on opening books file twice in
> list_by_author method. I have opened it only once and then reading each
> line while checking for a regex match. Am I missing something?


You open the catalog file once to read the books in the first place.

Then when you want a list of books by author Fred, you open the catalog
file, even though all the books are (somewhere) in memory.

Then when you want a list of books by author Bob, you open the catalog
file again. Then when you want a list of books by Sally, you open the
catalog file yet again. And so on.


-- 
Steven