[Tutor] No Elegant XML Output in ElementTree?

[Luis Galvan]

Hi tutors,
Okay, so I just started to learn ElementTree (and XML processing in general)
and I just can't, for the life of me, find a way to output the XML file in
an actual hierarchic presentation.  What I mean by this is that it all
outputs on a single line.  For example, I create an element tree in python:

____________________________
from xml.etree.ElementTree import ElementTree, SubElement, Element

# Create example tree.
root = Element("BFTypedBinder")
root.set("binderType", "codename")

# There's no point in this loop, it's only here for kicks.
while True:
    x = raw_input("Yes or No?  ")
    if x == "Yes":
        head = SubElement(root, "sample")

        title = SubElement(head, "sample2")
        title.text = "Sample Text"

        body = SubElement(root, "sample3")
        body.set("this", "that")

        body.text = "Done"
        break
    elif x == "No":
        break

# Save output.
tree = ElementTree(root)
tree.write(xml.xml)

___________________________
Output using Notepad:
<BFTypedBinder binderType="codename"><sample><sample2>Sample
Text</sample2></sample><sample3 this="that">Done</sample3></BFTypedBinder>


If I open xml.xml in Notepad, the whole tree is printed on one line, which
isn't what I want.  Of course, if I double click the file itself, it looks
normal, but I still need the data itself to look hierarchic as well (It's a
personal preference, and much more convenient when editing in a text
editor).  A few months back when I was attempting to learn Minidom, it
didn't have this problem.  I have looked through python.org's online
documentation on ET and there's no method, class, or function that could
help me achieve this, at least that I'm aware of.

I know I might have to write a solution myself, but before I try (which
would probably be disasterous), is there some existing built-in class in
here that can help me without having to "reinvent the wheel"?
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