On Jul 7, 6:27 am, John Machin <[EMAIL PROTECTED]> wrote: > On Jul 7, 4:59 pm, David <[EMAIL PROTECTED]> wrote: > > > Hi, > > > Very new to python. When I uncomment the line > > # self.im.putpalette(mkpalette()) > > Try to focus in on where the nasty is happening: > > p = mkpalette() > # self.im.putpalette(p) > > > > > in the following code, I get the error: > > > python $ ./mandelbrot.py > > Python(2860) malloc: *** Deallocation of a pointer not malloced: > > 0xff000000; This could be a double free(), or free() called with the > > middle of an allocated block; Try setting environment variable > > MallocHelp to see tools to help debug > > > I don't have the expertise to get by this error. Can someone help? > > > Thanks. > > > #! /usr/local/bin/python > > # Filename: mandelbrot.py > > > import Image, ImagePalette > > Read the docs:http://effbot.org/imagingbook/imagepalette.htm > > They imply that len(palette) should be 769 (256*3) > > > > > def mkpalette(): > > global palette > > Nothing to do with your problem, but lose the above line, and examine > carefully whatever induced you to include it. > > > palette = [0,0,0] > > for i in range(256): > > palette.extend([i*5%200+55,i*7%200+55,i*11%200+55]) > > return palette > > So now len(palette) == 257*3 instead of 256*3; this may be your > problem. > > HTH, > John
That did, it. The following corrects he problem. Thanks. def mkpalette(): palette = [0,0,0] for i in range(255): palette.extend([i*5%200+55,i*7%200+55,i*11%200+55]) return palette -- http://mail.python.org/mailman/listinfo/python-list