def get_sizeof(num, suffix='o'):
    """Readable file size
    :param num: Bytes value
    :type num: int
    :param suffix: Unit suffix (optionnal) default = o
    :type suffix: str
    :rtype: str
    """
    for unit in ['', 'k', 'M', 'G', 'T', 'P', 'E', 'Z']:
        if abs(num) < 1024.0:
            return '%3.1f %s%s' % (num, unit, suffix)
        num /= 1024.0
    return '%.1f%s%s' % (num, 'Yi', suffix)
