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 -- http://mail.python.org/mailman/listinfo/python-list