I've never written a binary parser before, so I'm looking for some starting
point.
I want to read an image file (Sun Raster format: RAS) and parse the included
color map, writing the color map as a text file (possible CSV format).
I can open the file in "rb" mode and read a certain number of bytes. But
when I try to do something with the value, Python complains that it's not in
the correct format.
Here is some sample code for reading the file (Magic is a 4-byte ID that
identifies the file as RAS format.)
import sys
infile = "TestImage.ras"
try:
FH = open(infile, 'rb')
except IOError, eStr:
print "ERROR: Cannot open ", infile, " for reading: ", eStr
sys.exit()
Magic = FH.read(4)
print "Magic: %d" % (Magic)
I tried coercing Magic to an int, but that didn't help.
Thanks,
David R
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David Ransier
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