Binary file reads and format using Python struct.unpack

#!/usr/bin/python
# Program to read and format binary files.
# 'rb' - read binary mode
# Use of struct.unpack
# Read 64k of memory locations.
# Write only 3 X 256 byte pages.
# Calling functions from a class.

import sys
import re
import commands
import struct

class rbin:
    def file_op(self,rfile):
        self.readfile  = rfile
        self.wfile = open('loadmem.txt', 'w')
        for line in self.readfile.readlines():
                for cnt in range (0,4096,1):
                    x = cnt*16
                    test = line[x:x+16]
                    if (len(test) == 14):
                        magic = struct.unpack("<14b",test)
                        for i in range(0,14,1):
                                self.wfile.write("0x%X\n" % (magic[i]))
                    else:
                        magic = struct.unpack("<16b",test)
                        for i in range(0,16,1):
                            if ((x <= 498) | ((x <= 65520) & (x >= 65280))):
                                self.wfile.write("0x%X\n" % (magic[i]))

        self.readfile.close()
        self.wfile.close()

# Call Class
T = rbin()
# Call function from class
T.file_op(open('reg.bin','rb'))