new_contents: # -*- coding: utf-8 -*-
  
  from math import log
  unit_list = zip(['', 'k', 'M', 'G', 'T', 'P'], [0, 0, 1, 2, 2, 2])
  
  
  def humanize_bytes(num, suffix='B', binary_prefix=False):
  	'''Return a human friendly byte representation.
  
  	Modified version from http://stackoverflow.com/questions/1094841
  	'''
  	if num == 0:
  		return '0 ' + suffix
  	div = 1000 if binary_prefix else 1024
  	exponent = min(int(log(num, div)), len(unit_list) - 1)
  	quotient = float(num) / div ** exponent
  	unit, decimals = unit_list[exponent]
  	if unit and binary_prefix:
  		unit += 'i'
  	return '{{quotient:.{decimals}f}} {{unit}}{{suffix}}'\
  		.format(decimals=decimals)\
  		.format(quotient=quotient, unit=unit, suffix=suffix)
  
subject: Add humanize_bytes function to library