human

#!/usr/bin/python2.7
import argparse
from math import log
from sys import stdin
parser=argparse.ArgumentParser(description="Convert bytes to human-readable format")
outfmt=parser.add_mutually_exclusive_group()
outfmt.add_argument("-b", "--binary", action="store_true", help="Use binary (1024-based) units")
outfmt.add_argument("-d", "--decimal", action="store_true", help="Use decimal (1000-based) units")
parser.add_argument("--reverse", action="store_true", help="Unimplemented. Convert human readable number to bytes")
args = parser.parse_args()

if not args.binary and not args.decimal:
	args.binary=True

dec_pref = ['', 'K', 'M', 'G', 'T', 'P']
def convert(size, decimal=False):
	if decimal:
		prefixes = dec_pref
		base = 1000
	else:
		prefixes = [''] + [p+'i' for p in dec_pref[1:]]
		base = 2**10
	magnitude = int(log(size, base))
	coef = 1.0 * size / base**magnitude
	decpts = str(1 if coef < 10.0 else 0)
	return ("{0:."+decpts+"f} {1}B").format(coef,prefixes[magnitude])

for line in stdin.readlines():
	print convert(long(line.strip()), decimal=args.decimal)