On Thu, Apr 9, 2015 at 2:42 PM, Ben Finney <ben+pyt...@benfinney.id.au> wrote: > Larry Martell <larry.mart...@gmail.com> writes: > >> I have an XML file that looks like this (this is just the pertinent >> part, the file is huge): > > It's also not a very helpful schema. Elements called “Node”, where the > actual type of element is in an attribute, just make your job needlessly > harder. > > They also pointlessly force you to use mixed case, when the convention > is to name all the elements in lowercase (‘parameter’, ‘current’, etc.). > > That said: What you need for this kind of searching within XML documents > is the XPath query language. ElementTree has limited support for it > <URL:https://docs.python.org/3/library/xml.etree.elementtree.html#elementtree-xpath>, > enough for your stated requirements. > >> I would like to use ElementTree to get 2 values from this: > > >>> from xml.etree import ElementTree > >>> doc_text = """… your example document text here …""" > >>> doc_tree = ElementTree.fromstring(doc_text) > >> SystemConfig.Environment.ToolName.Current > > >>> toolname_xpath = > ".//Node[@Name='SystemConfig']/Node[@Name='Environment']/Parameter[@Name='ToolName']//Current" > >>> toolname_element = doc_tree.find(toolname_xpath) > >>> toolname_element > <Element 'Current' at 0x7f3655452c28> > >>> toolname_element.text > 'KA21' > >> Events.LastEventExportTime.Current > > >>> lasteventexporttime_xpath = > ".//Node[@Name='Events']/Parameter[@Name='LastEventExportTime']//Current" > >>> lasteventexporttime_element = > >>> doc_tree.find(lasteventexporttime_xpath) > >>> lasteventexporttime_element > <Element 'Current' at 0x7f3655452db8> > >>> lasteventexporttime_element.text > '15/03/2014 05:56:00'
Thanks. I have this working with the help of Peter's reply. >> I've been trying for hours to get ElementTree to give me these 2 >> values, but nothing I do seems to work. Can anyone help me with this? > > Beat the designers of that document upside the head until they give you > a more easily-parsed schema. It's programmatically generated by various pieces of semiconductor manufacturing equipment. It's not in my power to get that changed. -- https://mail.python.org/mailman/listinfo/python-list
