pes 2008 camera

import sys, struct, binascii, msvcrt

OPTION_FILE='PES2008_OPTION01.bin'

def fixcrc(file=OPTION_FILE):
    f = open(file,"r+b")
    f.seek(0x100)
    data = f.read()
    data1 = data[:8] + '\0\0\0\0' + data[12:]
    crc = binascii.crc32(data1)
    f.seek(0x108)
    f.write(struct.pack('<i',crc))
    f.close()

def quit(code):
    sys.stdout.write('\nPress any key to exit')
    msvcrt.getch()
    sys.exit(code)

if __name__ == '__main__':
    sys.stdout.write('Enter camera angle (0-9): ')
    try: angle = int(sys.stdin.readline()[:-1])
    except ValueError: angle = -1
    if angle<0 or angle>9:
        print 'Bad angle. No changes made.'
        quit(1)

    f = open(OPTION_FILE,"r+b")
    f.seek(0x148)
    f.write(struct.pack('<i',angle)[0])
    f.close()
    fixcrc()
    print 'Camera angle succesfully changed to %d' % angle
    quit(0)