Ironpython: extension spoofer

import clr
from System import Console,Environment

clr.AddReferenceByName('Microsoft.VisualBasic, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a')
from Microsoft.VisualBasic.FileIO.FileSystem import RenameFile

def parseArg(arg):

    args = arg.split('-')

    if len(args) != 4:
        Console.WriteLine('Error, not enough arguments!')
        Console.WriteLine('Usage: extSpoofer.exe -FileName -NewName -NewExtension')
        Console.WriteLine('Example: extSpoofer.exe -server.exe -Hello -py')
        Console.WriteLine('\nPress any key to exit...')
        Console.ReadKey(True)
        exit(1)


    return args[1],args[2].strip(' '),args[3].strip(' ')


def extSpoof(filename,newname,falseExt):

    realExt = filename.split('.')[1]
    falseExt = falseExt[::-1]

    spoofedName = u'{0}\u202E{1}.{2}'.format(newname,falseExt,realExt)

    RenameFile(filename,spoofedName)
    Console.WriteLine(filename + ' renamed to '+spoofedName)

Console.WriteLine(Environment.CommandLine)
Console.WriteLine('\n')

filename,newname,extension = parseArg(Environment.CommandLine)
extSpoof(filename,newname,extension)

Console.WriteLine('Press any key to exit...')
Console.ReadKey(True)