combines several binary files

gistfile1.py

#!/usr/bin/python
import os
import string
import struct

img = ['partition.mbn','oemsblhd.mbn','appsboothd.mbn','qcsblhd_cfgdata.mbn','qcsbl.mbn','oemsbl.mbn','amss.mbn','appsboot.mbn','boot.img','system.img','userdata.img'];

class Combine(object) :

#constructor
def __init__(self, filename):
	if os.path.exists(filename) :
		self.filename = filename
		self.fsize = os.path.getsize(filename)
        print "file name =", self.filename, "\nfile size =", self.fsize
	else :
		print "file doesn't exist"	

def writeImg(self):
        inputfile = open(self.filename,'rb');
		outputfile = open('SD.nb0','wb');

		outputfile.write(struct.pack("i",self.fsize)) #write length (packed as integer)
        content = inputfile.read();
		for i in content :
      		outputfile.write(i);    #write img

		inputfile.close();
		outputfile.close();


Parti = Combine(img[0])
Parti.writeImg