It is no question of format... simply the line length which can be megabytes.. But Burcin pointed out the solution :
http://stackoverflow.com/questions/417703/python-c-like-stream-input One suggestion, though, wouldn't you feel this should be readily available from sage ? Or at list some function like Mathematica ReadList which can read simple numbers (the csv module almost does it !) Anyhow, thanks to all ! Nicolas On 4 juin, 10:31, Craig Citro <craigci...@gmail.com> wrote: > > This is almost what I want to do. I had figured out that trick but my > > problem is that the line that is input is, in my case, really long and > > gulps a lot of memory. > > > Thus, to save memory, I need to read the numbers one by one (or a > > small bunch of them at a time). It seems I have to read line by line, > > which in my case of a really long line, is not easy. > > > Thanks anyhow ! > > I guess I don't understand what the format of your file is. Can you > describe it a little more explicitly? Are you saying that there are > multiple real numbers per line? (Python could easily handle that case, > just use s.split(',') on each line.) Or are you saying the lines are > so long that just reading them into memory is a slowdown? How long is > one of these lines? > > -cc --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
