pretty print the output of `du | sort -rn`

pretty_du

#! /usr/bin/env python3
# Time-stamp: <2019-11-03 10:53:53 christophe@pallier.org>


""" Cleanly format the output of ``du``.

Example:

    du Documents/ | sort -rn | pretty_du | head

"""

import fileinput

from signal import signal, SIGPIPE, SIG_DFL
signal(SIGPIPE,SIG_DFL)  # prevents Broken pipe 

def sizeof_fmt(num, suffix='B'):
    """
    Converts a size in bytes into a human readable string.

    Copied from https://stackoverflow.com/questions/1094841/reusable-library-to-get-human-readable-version-of-file-size
    """
    for unit in ['','Ki','Mi','Gi','Ti','Pi','Ei','Zi']:
        if abs(num) < 1024.0:
            return "%3.1f%s%s" % (num, unit, suffix)
        num /= 1024.0
    return "%.1f%s%s" % (num, 'Yi', suffix)


for line in fileinput.input():
    size, folder = line.split(sep='\t')
    print(f'{sizeof_fmt(int(size) * 1024)}\t{size}\t{folder}', end='')