humanReadable

UNIT_PREFIXES = [
        '',    # '' for smallest postfix (-> Byte, ...)
        'Ki',  # Kibibyte      = 2^10 Bytes
        'Mi',  # Mebibyte      = 2^20 Bytes
        'Gi',  # Gibibyte      = 2^30 Bytes
        'Ti',  # Tebibyte      = 2^40 Bytes
        'Pi',  # Pebibyte      = 2^50 Bytes
        'Ei',  # Exbibyte      = 2^60 Bytes
        'Zi',  # Zebibyte      = 2^70 Bytes
        'Yi',  # Yobibyte      = 2*80 Butes
        'Bi',  # Brobibyte     = 2^90 Bytes (from Brontobyte (BB); not yet official SI prefix)
        'GPi'  # Geopibyte (?) = 2^100 Bytes (from Geopbyte (GPB); not yet official SI prefix)
]

def toHumanReadable(num, suffix='B'):
    """
    Converts a number into a human readable format: humanReadableSize(168963795964) -> '157.4 GiB'
    Note: we use binary prefixes (-> 1kiB = 1024 Byte)
    We expect data type to be int (-> we do not expect "half" bytes) or reasonable convertible to int
    :param num: Number to convert
    :param suffix: The suffix that will be added to the quantifier
    :return: Formatted string
    """
    if type(num) == int
    count = 0
    bit_10 = 10
    num_tmp = num
    for prefix in UNIT_PREFIXES:
        if abs(num_tmp) > 1024:
            num_tmp >>= bit_10
            count += 1
        else:
            return "{: .2f} {}{}".format(num/2**(count*bit_10), prefix, suffix)