import xml.etree.cElementTree as ET

# build a tree structure
root = ET.Element("html")

head = ET.SubElement(root, "head", attrib={"dir":"ltr"})

title = ET.SubElement(head, "title")
title.text = "Page Title"

body = ET.SubElement(root, "body")
body.set("bgcolor", "#ffffff")

body.text = "Hello, World!"

# wrap it in an ElementTree instance, and save as XML
tree = ET.ElementTree(root)
tree.write("page.xhtml")


# The above program is an example of a bug with cElementTree.

# The file is identical to the example provided on the effbot.org
# website (http://effbot.org/zone/element-index.htm#usage),
# with just a couple of exceptions.
#
# Line 1 was adjusted to import the c version of the module, from the
# appropriate location for Python 2.5 (xml.etree)
#
# Line 6 was adjusted to include an attribute by keyword (attrib=...).
#
# This program runs fine in the Python implementation of ElementTree,
# but fails in the c implementation.  (My understanding is that the c
# implementation should be "plug compatible" with the python version.)
#
Error = """

Traceback (most recent call last):
  File "C:/PythonProjects/junk/cElementTreeTest.py", line 18, in <module>
    tree.write("page.xhtml")
  File "C:\Python25\lib\xml\etree\ElementTree.py", line 663, in write
    self._write(file, self._root, encoding, {})
  File "C:\Python25\lib\xml\etree\ElementTree.py", line 707, in _write
    self._write(file, n, encoding, namespaces)
  File "C:\Python25\lib\xml\etree\ElementTree.py", line 698, in _write
    _escape_attrib(v, encoding)))
  File "C:\Python25\lib\xml\etree\ElementTree.py", line 830, in _escape_attrib
    _raise_serialization_error(text)
  File "C:\Python25\lib\xml\etree\ElementTree.py", line 777, in _raise_serialization_error
    "cannot serialize %r (type %s)" % (text, type(text).__name__)
TypeError: cannot serialize {'dir': 'ltr'} (type dict)
"""

# Workaround:  remove the keyword "attrib=", and it works in both.
print "ok"