On Oct 31, 1:11 am, Chris Rebert <c...@rebertia.com> wrote: > On Sat, Oct 30, 2010 at 8:32 PM, André <andre.robe...@gmail.com> wrote: > > I'm trying to create pbm (portable bitmap) files using Python 3 and > > have run into a problem. The example I am using is the Python 2 > > Mandelbrot program found at > >http://shootout.alioth.debian.org/u32/program.php?test=mandelbrot&lan... > > > When I run it using Python 2 with size=100, I get a file of size 1311 > > bytes. This file contains the correct image. > > > When I run it using Python 3 with the same parameter (and replacing > > xrange by range - the only change suggested by 2to3), I get a file of > > size 1812 bytes; this file does not contain the right image. > > > Any help would be much appreciated. > > Have you tried changing all instances of chr(<whatever>) to > bytes([<whatever>]) ? Yes, I had. And I got the following traceback:
Traceback (most recent call last): File "mandel_orig.py", line 39, in <module> main() File "mandel_orig.py", line 30, in main cout(bytes([byte_acc])) TypeError: must be str, not bytes André > In Python 3, chr() always returns Unicode rather than a bytestring; I > suspect this might be the cause of your problem. > > If my suggestion fixes things, then arguably 2to3 ought to have warned > about chr() and thus you should report this as a bug. > > Cheers, > Chris > --http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list