richard kappler wrote: > I have an xml file that get's written to as events occur. Each event > writes a new 'line' of xml to the file, in a specific format, eg: > sometthing like this: > > <heresmydataline xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; > xsi:noNamespaceSchemaLocation="Logging.xsd" version="1.0"><child of > heresmydata/><anotherchildofheresmydata/><grandchild>somestuff</grandchild></heresmydata> > > and each 'line' has that same structure or format. > > I've written a script that parses out the needed data and forwards it on > using regex's, but think it might be better to use an xml parser. I can > parse out what I need to if I have just one line in the file, but when > there are number of lines as there actually are, I can't figure out how to > get it to work. > > In other words, with a one line file, this works fine and I understand it: > > import xml.etree.cElementTree as ET > tree = ET.ElementTree(file='1lineTest.log' > grandchild = tree.find('grandchild') > print grandchild.tag, grandchild.text > > and I get the output I desire: > > grandchild Sally > > But if I have several lines in the file try to run a loop: > > import xml.etree.cElementTree as ET > f1 = open('5lineTest.log', 'r') > lineList = f1.readlines() > Imax = len(lineList) > > i = 0 > while i <= Imax: > tree = ET.ElementTree(lineList[i]) > grandchild = tree.find('grandchild') > print grandchild.tag, grandchild.txt > i += 1 > > Traceback (most recent call last): > File "<stdin>", line 4, in <module> > AttributeError: 'int' object has no attribute 'tag' > > and yet I can do: > > print lineList[0] and it will print out the first line. > > I get why (I think), I just can't figure out a way around it. > > Guidance please?
Ceterum censo ;) Abandon the notion of lines! To process nodes as they arrive from the parser have a look at iterparse: http://effbot.org/zone/element-iterparse.htm https://docs.python.org/dev/library/xml.etree.elementtree.html#xml.etree.ElementTree.iterparse _______________________________________________ Tutor maillist - [email protected] To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
