humanbibs.py

import collections
def humanize_bibytes(n, prefixes=collections.OrderedDict((
                    (0, 'B'),
                    (1024, 'KiB'),
                    (1048576, 'MiB'),
                    (1073741824, 'GiB'),
                    (1099511627776, 'TiB'),
                    (1125899906842624, 'PiB'),
                    (1152921504606846976, 'EiB'),
                    (1180591620717411303424, 'ZiB'),
                    (1208925819614629174706176, 'YiB')))):
    ''' Convert big numbers into easily-human-readable ones.
    '''
    for value, prefix in reversed(prefixes.items()):
        if n >= value:
            return '{:.2f} {}'.format(float(n) / value, prefix)