Get a human readable filesize of the output

human_file_size.py

from __future__ import print

# Adopted from
# https://web.archive.org/web/20111010015624/http://blogmag.net/blog/read/38/Print_human_readable_file_size
# https://stackoverflow.com/questions/1094841/reusable-library-to-get-human-readable-version-of-file-size

def sizeof_fmt(num, suffix='B'):
    for unit in ['', 'K', 'M', 'G', 'T', 'P', 'E', 'Z']:
        if abs(num) < 1024.0:
            return "%3.1f%s%s" % (num, unit, suffix)
        num /= 1024.0
    else:
        return "%.1f%s%s" % (num, 'Y', suffix)

if __name__ == "__main__":
  import sys
  print(sizeof_fmt(sys.argv[1]))