Pretty printing XML in Python

在Python中打印xml的最佳方式（甚至是各种方式）是什么？

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import xml.dom.minidom

xml = xml.dom.minidom.parse(xml_fname) # or xml.dom.minidom.parseString(xml_string)
pretty_xml_as_string = xml.toprettyxml()

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lxml is recent, updated, and includes a pretty print function

import lxml.etree as etree

x = etree.parse("filename")
print etree.tostring(x, pretty_print=True)

Check out the lxml tutorial: http://lxml.de/tutorial.html

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Another solution is to borrow this indent function, for use with the ElementTree library that's built in to Python since 2.5. Here's what that would look like:

from xml.etree import ElementTree

def indent(elem, level=0):
    i = "n" + level*"  "
    j = "n" + (level-1)*"  "
    if len(elem):
        if not elem.text or not elem.text.strip():
            elem.text = i + "  "
        if not elem.tail or not elem.tail.strip():
            elem.tail = i
        for subelem in elem:
            indent(subelem, level+1)
        if not elem.tail or not elem.tail.strip():
            elem.tail = j
    else:
        if level and (not elem.tail or not elem.tail.strip()):
            elem.tail = j
    return elem        

root = ElementTree.parse('/tmp/xmlfile').getroot()
indent(root)
ElementTree.dump(root)

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