Speedup Bitmap Parser
bearophileHUGS at lycos.com
bearophileHUGS at lycos.com
Mon Feb 16 16:29:11 EST 2009
Jayson Santos:
> Hello people, I'm writing a Bitmap parser for study purposes,
This code:
x = 0
y = 0
for line in bmp.bitmap_lines.lines:
for color in xrange(len(line.colors)):
canvas.create_line(x, y, x+1, y, fill="#%02x%02x%02x"
% (line.colors[color].red, line.colors[color].green, line.colors
[color].blue))
x += 1
x = 0
y += 1
May be replaced with something like:
for x, color in enumerate(line.colors):
canvas.create_line(x, y, x+1, y, fill="#%02x%02x%02x" %
(color.red, color.green, color.blue))
And maybe a RGBTriple may be replaced with an immutable namedtuple.
Using nested classes may be overkill for this program.
Use the Python profiler and profile your code with a real image, and
show us/me the profiler results, so I can give you some suggestions to
speed up your code.
Bye,
bearophile
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