[Tutor] Finding the differences between two lists

[Justin Wendl]

Hi John,

Thanks for the quick response.  Unfortunately it is returning the same
result..

- Justin


On Thu, Aug 25, 2011 at 2:59 PM, John <washakie at gmail.com> wrote:

> Not entirely sure, but I think it is as simple as:
>
> scanResults = open('scanResults.txt', 'r').readlines()
> verifiedList = open('verifiedList.txt', 'r').readlines()
>
> Now both are lists. I assume each mac address is on it's own line?
>
> -john
>
>
> On Thu, Aug 25, 2011 at 8:56 PM, Justin Wendl <justin.wendl at gmail.com>
> wrote:
> > Hello,
> >
> > Bare with me, as I am new to Python and a beginner programmer.
> > I am trying to compare two lists (not of the same length), and create a
> new
> > list of items that are -not- found in both lists.
> >
> > Scenario: I have a list of MAC addresses that are known and good, and am
> > comparing it to a list of MACs found in a scan.  I want to weed out the
> > those which are unknown.  I am using IDLE (Python 2.7) on Windows, and
> all
> > files are in the same directory.
> >
> > Code:
> >
> > scanResults = open('scanResults.txt', 'r')
> > verifiedList = open('verifiedList.txt', 'r')
> > badMacs = []
> >
> > for mac in scanResults:
> >   if mac not in verifiedList:
> >     print mac
> >     badMacs.append(mac)
> >   else:
> >     break
> >
> >
> > When I print 'badMacs', the results come up empty:
> > []
> >
> >
> > Any help would be greatly appreciated!
> >
> > Regards,
> > Justin
> >
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>
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