gistfile1.py

import lxml.builder as builder
from lxml import etree

foo = builder.E.foo
bar = builder.E.bar
bing = builder.E.bing

foo_xml = foo(
    bar(
        bing("Some nested thing."),
        more="nested things",
        even="more nested things"
    ),
    attribute_one="animal",
    attribute_two="plant",
    xmlns="https://url.to.github.project"
)

print etree.tostring(foo_xml, pretty_print=True)

Comes out as:

<foo attribute_one="animal" xmlns="https://url.to.github.project" attribute_two="plant">
  <bar even="more nested things" more="nested things">
    <bing>Some nested thing.</bing>
  </bar>
</foo>

The problem might arise if I needed to set one of my element tag names to a keyword, e.g.:

set = builder.E.set

set_xml = set(
    attribute="foo"
)

But I think I can just do this:

different_set = builder.E.set