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To: python-list@python.org
From: Johannes Graumann <johannes_graumann@web.de>
Subject: Re: Convert MAC to hex howto
Followup-To: gmane.comp.python.general
Date: Sun, 07 Oct 2012 23:38:26 +0300
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Xref: csiph.com comp.lang.python:30938

MRAB wrote:

> On 2012-10-07 20:44, Johannes Graumann wrote:
>> Dear all,
>>
>> I'm trying to convert
>> '00:08:9b:ce:f5:d4'
>> to
>> '\x00\x08\x9b\xce\xf5\xd4'
>> for use in magic packet construction for WakeOnLan like so:
>> wolsocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
>>         wolsocket.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
>> wolsocket.sendto('\xff'*6 + '\x00\x08\x9b\xce\xf5\xd4'*16,
>> (expectedlanbroadcast, 80))
>>
>> This is what I came up whith, but I remain puzzled on how to preserver
>> the leading '\h' ... thanks for any hint
>>
>> expectedservermac = '00:08:9b:ce:f5:d4'
>> hexcall = str.split(expectedservermac,":")
>> hexcall.insert(0,'')
>> hexcall = "\\x".join(hexcall).decode('string_escape')
>>
>> Thanks for any pointers.
>>
> It looks like you're using Python 2, so:
> 
>  >>> s = '00:08:9b:ce:f5:d4'
>  >>> "".join(chr(int(x, 16)) for x in s.split(":"))
> '\x00\x08\x9b\xce\xf5\xd4'

Many thanks!

Joh