[Tutor] Finding the differences between two lists

[John]

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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