Something

def uncompressTarBz2(filepath, extractPath = None, catchEmpty = False):
    entropyLog.log(ETP_LOGPRI_INFO,ETP_LOGLEVEL_VERBOSE,"uncompressTarBz2: called.")
    if extractPath is None:
	extractPath = os.path.dirname(filepath)
    if not os.path.isfile(filepath):
        raise OSError
    try:
        try:
            tar = tarfile.open(filepath,"r")
        except CompressionError:
            tar = tarfile.open(filepath,"r:bz2") # python 2.4 crashes above, so supporting only bz2
    except tarfile.ReadError:
        if catchEmpty:
            return 0
        else:
            raise

    import pdb
    pdb.set_trace()

    directories = set()
    for tarinfo in tar:
        if tarinfo.isdir():
            # Extract directory with a safe mode, so that
            # all files below can be extracted as well.
            try:
                os.makedirs(os.path.join(extractPath, tarinfo.name), 0777)
            except EnvironmentError:
                pass
            directories.add(tarinfo)
        else:
            try:
                tarinfo.name = tarinfo.name.encode(sys.getfilesystemencoding())
            except:  # default encoding failed
                try:
                    tarinfo.name = tarinfo.name.decode("latin1") # try to convert to latin1 and then back to sys.getfilesystemencoding()
                    tarinfo.name = tarinfo.name.encode(sys.getfilesystemencoding())
                except:
                    raise
            tar.extract(tarinfo, extractPath.encode(sys.getfilesystemencoding()))

    # Reverse sort directories.
    #'''
    directories = list(directories)
    directories.sort(lambda a, b: cmp(a.name, b.name))
    directories.reverse()

    origpath = extractPath
    # Set correct owner, mtime and filemode on directories.
    for tarinfo in directories:
        extractPath = os.path.join(extractPath, tarinfo.name)
        try:
            tar.chown(tarinfo, extractPath)
            tar.utime(tarinfo, extractPath)
            tar.chmod(tarinfo, extractPath)
        except tarfile.ExtractError:
            if tar.errorlevel > 1:
                raise
    #'''

    del directories
    tar.close()
    del tar
    if os.listdir(origpath):
        return 0
    else:
        return -1