[Tutor] str format conversion help
'\x00\x11\xb2\x00@,O\xa4' the above str is being returned from one key/value pair in a dictionary. it is the addr of a network device. i want to store the addr's in their 8byte mac format like this, [00 11 b2 00 40 2C 4F A4] the combinations of format strings using the print statement hasn't resulted in what i need. looking for a suggestion on how to format this, '\x00\x11\xb2\x00@,O\xa4' into this [00-11-B2-00-40-2C-4F-A4] tia Best regards, eMyListsDDgmailto:emylists...@gmail.com ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] str format conversion help
Steve, glad you pointed that out. struct.unpack or something...i'll look into that module. thx > On 14-Jul-10 11:35, eMyListsDDg wrote: >> '\x00\x11\xb2\x00@,O\xa4' >> the above str is being returned from one key/value pair in a dictionary. it >> is the addr of a network device. >> i want to store the addr's in their 8byte mac format like this, >> [00 11 b2 00 40 2C 4F A4] >> the combinations of format strings using the print statement hasn't resulted >> in what i need. > A few hints: > Remember that the string is a set of raw binary values, so using ord() > on each character would give you the numbers you can then have > str.format() render as hex values. > You might also find the struct module helpful. >> looking for a suggestion on how to format this, '\x00\x11\xb2\x00@,O\xa4' >> into this [00-11-B2-00-40-2C-4F-A4] >> tia >> Best regards, >> eMyListsDDgmailto:emylists...@gmail.com >> ___ >> Tutor maillist - Tutor@python.org >> To unsubscribe or change subscription options: >> http://mail.python.org/mailman/listinfo/tutor > ___ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > http://mail.python.org/mailman/listinfo/tutor -- Best regards, eMyListsDDgmailto:emylists...@gmail.com ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] str format conversion help
Hello Alan,
> First please start new threads wirth a new email, do not reply to
thought i did, my apologies.
> "eMyListsDDg" wrote
> First please start new threads wirth a new email, do not reply to
> a previous post - it confuses threaded readers. (and sometimes
> human readers too!)
>> '\x00\x11\xb2\x00@,O\xa4'
>> the above str is being returned from one key/value pair in
>> a dictionary. it is the addr of a network device.
>> i want to store the addr's in their 8byte mac format like this,
>>[00 11 b2 00 40 2C 4F A4]
> Thats what you've got. The string is merely a representation
> of that data.
>> the combinations of format strings using the print statement
>> hasn't resulted in what i need.
> format strings are used to display data not to store it.
> Do you really want to display the data in the format you've
> shown? Or do you really want to store it as 8 bytes?
the format shown. now that you point out a few things, it really wouldn't
matter.
> The two concepts are completely different and more
> or less unrelated.
i see that now, as a newbie to python.
>> looking for a suggestion on how to format this,
>> '\x00\x11\xb2\x00@,O\xa4' into this [00-11-B2-00-40-2C-4F-A4]
> OK, to display it you need to extract each byte and convert it to
> a string representing the hex value. Fortunately you an treat a
> string of bytes as charactrers and the hex() function will give you
> the hex representation. So...
> print "[%s]" % ('-'.join([hex(v) for v in theValue]) )
helps me to understand the concept differences you pointed out better
appreciate the help...
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Re: [Tutor] str format conversion help
thanks,
def conv_tst(bytes)
return ('-'.join([binascii.hexlify(v) for v in bytes]))
i ended up experimenting with the suggestions and the above returns what i'm
looking for, i.e., the formatted mac addr to store in a sqlite db.
i'm sure there are other ways, though the above is working now.
mucho gracias all
> use de fucntion encode. For example:
> '\x7e\x00\x20'.encode('hex') will return that = '7e0020'
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Re: [Tutor] str format conversion help
yep, i noticed. ;^)
no prob, through your help, it is working the way i needed.
thanks
>> print "[%s]" % ('-'.join([hex(v) for v in theValue]) )
> Oops, that leaves 0x at the front of each byte.
> You could strip that off with
> print "[%s]" % ('-'.join([hex(v)[2:] for v in theValue]) )
> Sorry,
> Alan G.
--
Best regards,
eMyListsDDgmailto:emylists...@gmail.com
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[Tutor] howto install a "curses" lib on win7
on a win7 system with python ver=2.7.14, a python script i'm trying to utilize returns : #- Traceback (most recent call last): File "salamandra.py", line 16, in import curses File "c:\python27\lib\curses\__init__.py", line 15, in from _curses import * ImportError: No module named _curses #- if this machine was running linux probably wouldn't be an issue, but on Win7 how can i get a 'curses' lib installed so this script runs? tia ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] howto install a "curses" lib on win7
i had found this one "curses-2.2-cp27-none-win_amd64.whl" at www.lfd.uci.edu/~gohlke/pythonlibs/#curses , used pip to install. earlier pip attempts failed, but that was me/user typo error i realized after your reply. got the syntax correct for pip and the .whl installed. i put link above incase another user has same issue, thanks for the help, the script runs and didn't need cygwin thankfully. > On 28/10/17 06:10, eMyListsDDg wrote: >> on Win7 how can i get a 'curses' lib installed so this script runs? > Do a Google search for windows curses, there are at least > a couple of options. I've no experience of how well they > work however because... > ...as a last resort, install cygwin and use the > Python that comes with cygwin which includes a curses module > that works with the cygwin bash terminal. But cygwin is big > and probably a sledgehammer for your nut if all you want is > curses. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
