Extract GPS from Kismet log with ElementTree

I have read a lot of noise about ElementTree but never really used it. Tonight i need to extract a bunch of GPS data from a kismet log file. Let’s give it a try

from elementtree import ElementTree

data = open('Kismet-May-22-2005-4.xml','r').read()

detection = ElementTree.XML(data)

for node in detection.getchildren():
try:
print "SSID: " + node.find('SSID').text,
except AttributeError:pass  #hidden SSID
print "BSSID: " +  node.find('BSSID').text,
gps = node.find('gps-info')
print "Lon: " + gps.find('max-lon').text +  " Lat: "  + gps.find('max-lat').text

Really simple, and seems to offer really good speed. I now have another weapon for every day work.

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admin May 23rd, 2005


2 Responses to “Extract GPS from Kismet log with ElementTree”

  1. # Fredrikon 26 May 2005 at 4:49 pm

    Possible tweaks:

    - use ElementTree.parse to read the file (but this returns an ElementTree wrapper, not an Element; use getroot() to get the root element, or use findall() to pick out the right kind of subnodes).

    - getchildren() is deprecated; to get all subelements, just loop over the parent container (i.e. “for node in detection” instead of “for node in detection.getchildren()”)

    - node.find(tag).text can be written as node.findtext(tag) (however, the latter returns None if no matching element could be found, the former raises an AttributeError exception).

    - you can use path syntax to pick out text from subelements (e.g. node.findtext(”gps-info/max-lon”) should work).  this is probably slower if you need more than a few subelement texts, though.

    Cheers /F

  2. # Jkxon 26 May 2005 at 5:51 pm

    Thanks for this comment, Fredrick, I now wondering how to merge 2 Elementree, or choose the best element in a node I gonna read the doc.

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