On Tue, Feb 12, 2013 at 4:56 PM, Steven D'Aprano <st...@pearwood.info>wrote:
> 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. > > > > Thank you for your feedback Dave and Steven. I realize that I am opening the file for every add/delete call. I thought you were referring to duplicate file open call within the code snippet itself. I am not sure how to save an object in memory to a file before exiting the program. Any examples or related documentation links would be really helpful. I am guessing it would be using some kind of before teardown method, but not sure about it. Any help? thanks, N
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