I am looking for the most efficient method of replacing a repeating sequence in a byte string returned from a imaging .dll, connected via
I receive the byte string with the following sequence 'bgrbgrbgrbgr' and I would like to convert this to 'rbgrbgrbgrbg' FWIW, the string is created using ctypes.create_string_buffer function The following code works but feels a bit clunk and is rather slow too. blist = list(buffer) for start in xrange(0,len(blist), 3): try: blue = blist[start] red = blist[start+2] blist[start] = red blist[start+2] = blue except IndexError: pass new_buffer = ''.join(blist) new_buffer is then passed to a wx program to create and image. Any thoughts comments would be appreciated. geoff. PS: I started this post earlier, but I think I hit the send button too soon. My apologies to the group for sloppy typing. -- http://mail.python.org/mailman/listinfo/python-list