def transfer_size(self):
        """Size of transfer in bytes (e.g.: 8, 4k, 2m, 1g)"""
        ts = self.attributes['transfer_size']
        if isinstance(ts, six.string_types):
            ts = shlex.split(ts)
        ts = [str(e) for e in ts]
        return ts
Size of transfer in bytes (e.g.: 8, 4k, 2m, 1g)