text: def binary_prefix(value, binary=True):
      '''Return a tuple with a scaled down version of value and it's binary prefix
                                          
      Parameters:                       
      - `value`: numeric type to trim down
      - `binary`: use binary (ICE) or decimal (SI) prefix
      '''       
      SI = 'kMGTPEZY'   
      unit = binary and 1024. or 1000.
      for i in range(-1, len(SI)):
          if abs(value) < unit:
              break
          value/= unit
      return (value, i<0 and '' or (binary and SI[i].upper() + 'i' or SI[i]))
  