import os,struct,sys
 
if len(sys.argv) != 2:
  print 'Usage:python viewer.py bmpfile'
  exit(1)
 
filename = sys.argv[1]
 
header_keys = ('signature','file size','reserved','reserved','data offset','size','width','height','planes','bitCount','compression','image size','XpixelsPerM','YpixelsPerM','ColorUsed','ColorImportant')
header_fmt = '=2sihhiiiihhiiiiii'
palette_fmt = 'BBBB'*256
 
f = open(filename,'rb')
 
#read header
print '----Header----'
s_header = f.read(54)
for k,it in zip(header_keys,struct.unpack(header_fmt,s_header)):
  print "%s : %s" %(k,it)
 
#read palette
print '----palette----'
s_palette = f.read(1024)
palette = struct.unpack(palette_fmt,s_palette)
i = 0
while i < len(palette):
  print palette[i:i+4]
  i += 4