bytes2human

#!/usr/bin/env python3

import fileinput
import sys
import humanbytes
import re

args = sys.argv[1:]
if len(args) <= 0:
    pass

getcol1 = re.compile(rb'^ (?P<match> [\d.]+ ) \s? (?P<rest> .*$)', re.VERBOSE)
r = re.compile(rb' (?P<num> [0-9]+ )[.](?P<digits> [0-9]+) (?P<suffix> [\w])', re.VERBOSE)

for line in fileinput.input(mode='rb'):
    orig = line
    line = line.strip()
    m = getcol1.search(line)
    if m:
        inp = m.expand(rb'\g<match>')
        rest = m.expand(rb'\g<rest>')

        outp = humanbytes.bytes2human(inp.decode('utf-8'), format='%(value)0.1f%(symbol)s').encode('utf-8')
        # if r.search(outp):
        #     outp = re.sub(r, b'\g<num>.\g<digits>\g<suffix>', outp)

        # if there are multiple leading digits, strip off the decimals.
        outp = re.sub(rb'([0-9][0-9]+)[.][0-9]+', rb'\1', outp)

        # show bytes as plain numbers.
        outp = re.sub(rb'([0-9]+)(?:[.][0-9]*)?\s*B', rb'\1', outp)

        # add some padding.
        outp = outp.rjust(4)

        #sys.stdout.write("%s %s\n" % (outp, rest))
        #sys.stdout.buffer.write("%b %b\n" % (outp, rest))
        sys.stdout.buffer.write(outp)
        sys.stdout.buffer.write(b" ")
        sys.stdout.buffer.write(rest)
        sys.stdout.buffer.write(b"\n")
        sys.stdout.buffer.flush()
    else:
        sys.stdout.buffer.write(orig)