Convert bytes into Kbytes, MBytes & cie

mo.py

#!/usr/bin/env python
"""
Converts large bytes into a more readable form.

Example::
  % python mo.py 769736704
  734.08 Mio - 751696.00 Kio

"""
import sys

def transform(value):
    UNITS = ('o', 'Kio', 'Mio', 'Gio', 'Tio', 'Pio', 'Eio', 'Zio', 'Yio')
    ret = []
    for i, unit in enumerate(UNITS):
        x = value / (1024.0 ** i)
        if x < 1:
            break
        ret.append((x, unit))
    return ret

def transformat(value, num=2):
    return ' - '.join('%.2f %s' % z for z in reversed(transform(value)[-num:]))

for value in sys.argv[1:]:
    print(transformat(int(value)))