Python XML processing with lxml

To serialize (convert to XML) the content of a document contained in some ElementTree instance ET, use this method call:

ET.write(file, pretty_print=False)

You must supply a writeable file object, or the name of a file to be written. If you set argument pretty_print=True, the method will attempt to fold long lines and indent the XML for legibility.

For example, if you have an ElementTree instance in a variable page containing an XHTML page, and you want to write it to the standard output stream, this statement would do it:

import sys
page.write(sys.stdout)