Nayuta .arb copier

import os
import struct

def get_data(filename):
    totalbytes = os.path.getsize(filename)
    infile = open(filename, 'rb')
    totalfiledata = infile.read(totalbytes)
    infile.close()
    return totalfiledata

mypath = os.path.dirname(os.path.realpath(__file__))
filelist = []
for dirName, subdirList, fileList in os.walk(mypath):
    filelist.extend([dirName + '\\' + f for f in fileList if os.path.splitext(f)[1] == '.arb'])

output = []
for f in filelist:
    filedata = get_data(f)
    f = os.path.splitext(os.path.basename(f))[0] + '.orig'
    outfile = open(f,'wb')
    outfile.write(filedata)
    outfile.close()