Hex to Octal (3 digit) converer

Philip Lord philip at neoncluster.com
Mon May 4 00:46:40 CDT 2015

Thanks Eric,
I’ve never used python, so it’ll certainly be a learning curve.
If I can get it to work, It’ll ease my pain. May give it a go this weekend….Possible high chance of failure though!


> On May 4, 2015, at 5:07 PM, Eric Smith <spacewar at gmail.com> wrote:
>> I’m looking for a program (or preferably an online conversion site, as I use Macintosh) that can convert a long stream of Hex, to 3 digit Octal.
> With python 2.7 installed, the following program, which I call
> hex2oct.py, will do it:
> #!/usr/bin/python2
> # Copyright 2015 Eric Smith <spacewar at gmail.com>
> # Released under Creative Commons BY-SA 4.0 International Public License
> # https://creativecommons.org/licenses/by-sa/4.0/legalcode
> import fileinput,re,sys
> r = re.compile('[0-9A-F]+', re.I)
> for line in fileinput.input():
>    while len(line):
>        m = r.search(line)
>        if m:
>            sys.stdout.write(line[:m.start()])
>            sys.stdout.write("%03o" % int(m.group(),16))
>            line = line[m.end():]
>        else:
>            sys.stdout.write(line)
>            line = ''
> Just put that in a file and chmod it to be executable. Change the path
> in the first line to the location of your python executable.
> (Alternatively, put "python" or the full path to the python executable
> on the command line before then name of this program.)
> By default It takes data from standard input, or you can specify one
> or more filenames on the command line to be processed sequentially.
> From standard input, enter as many lines of input as you like, then an
> end-of-file (control-D on Unix and derivatives, control-Z on Windows,
> though I haven't tested it on Windows).  Exit by an empty line with an
> end-of-file.
> Any non-hexadecimal data before, between, or after hexadecimal numbers
> is preserved, so you can have commas, tabs, etc. in the input and get
> them back in the output.
> Hexadecimal values larger than FF will likely yield undesired results.
> The program could be easily modified to ignore them, complain about
> them, or automatically split up sequences of more than 2 hex digits.

More information about the cctech mailing list