[Tutor] Converting MAC address . Need Help

[Travis Spencer]

On 2/27/06, Kent Johnson <kent37 at tds.net> wrote:
> Sudarshana KS wrote:
> > The problem i am facing is the mac address i have is in the form
> > 00:11:22:33:44:55 need to convert to '\x00\x11\x22\x33\x44\x55'

Perhaps I'm mistaking but it seems that you need to prepend the `\x'
escape sequence to the mac address you already have and replace the
colons with the same sequence.  If it is any harder than that, I'm
missing something.  If I got what you mean, Sudarshana, you can
achieve your goal with this one-liner:

>>> macAddress = '00:11:22:33:44:55'
>>> reduce(lambda a, b: a + r"\x" + b, macAddress.split(':'), "")
'\\x00\\x11\\x22\\x33\\x44\\x55'

Perhaps you may prefer this:

>>> "\\x" + macAddress.replace(":", "\\x")
'\\x00\\x11\\x22\\x33\\x44\\x55'

> The list elements are still strings, you need to convert them to
> integers.

Why is this needed, Kent?  Why not just leave them as strings?

> The strings are in hexadecimal so use the optional base
> parameter to int():
>   >>> int('11', 16)
> 17
>
> Finally you have to convert this number to a byte of a string using chr():
>   >>> chr(17)
> '\x11'

Seems like a lot of extra work to me.

--

Regards,

Travis Spencer