Parsing XML - Newbie help

[Fredrik Lundh]

"rh0dium" wrote:

> Ok so up to here I am ok.  I find ( If you want the full xml let me
> know) two blocks of system memory.  It MUST be "System Memory" only.
> Now how do I get a list of all of the children "nodes" of this.  They
> are named bank:N  ( i.e bank:0, bank:1 etc [see below] ).  For each one
> of those there may ( or may not ) have some memory stuck in it.  I can
> tell if there is memory because a size is given.  I want to a list of
> all of the sizes.  From there I can say you have sum(memory) in
> len(memory) banks of total banks.

once you've found a memory node, you should be able to simply loop
over all node children, optionally filter on the id attribute, and look for
size elements.

        sizes = []

        for elem in tree.findall(".//node"):
            if elem.get("class") == "memory":
                if elem.findtext("description") == "System Memory":
                    print "Found system memory bank"
                    # loop over subnodes
                    for node in elem:
                        size = node.findtext("size")
                        if size:
                            sizes.append(int(size))

        print len(sizes), sum(sizes)

note that this assumes that the size is always in bytes.  if not,
you have to check the units attribute; e.g.

                    size_elem = node.find("size")
                    if size_elem is not None:
                        unit = size_elem.get("units", "bytes")
                        size = int(size_elem.text)
                        ...

</F>