Python操作XML

from xml.etree.ElementTree import ElementTree
from xml.etree.ElementTree import Element
from xml.etree.ElementTree import SubElement
from xml.etree.ElementTree import dump
from xml.etree.ElementTree import Comment
from xml.etree.ElementTree import tostring

#url = "http://itms-server/Media_ConfigFiles/Media_File2File_Mpeg2toMpeg2_Single_001.xml"

'''
<?xml version="1.0"?>
<PurchaseOrder>
  <account refnum="2390094"/>
  <item sku="33-993933" qty="4">
    <name>Potato Smasher</name>
    <description>Smash Potatoes like never before.</description>
  </item>
</PurchaseOrder>
'''
#f = open("book.xml", 'w')
#f.close()

book = ElementTree()

purchaseorder = Element('PurchaseOrder')
book._setroot(purchaseorder)

SubElement(purchaseorder, 'account', {'refnum' : "2390094"})

item = Element("item", {'sku' : '33-993933', 'qty' : '4'})
purchaseorder.append(item)

print item.items()
print item.attrib
print item.get('sku')

SubElement(item, 'name').text = "Potato Smasher"
SubElement(item, 'description').text = "Smash Potatoes libe never before"

##displaying the content of the xml docuemnt
'''
'''
print purchaseorder.find('account')
print purchaseorder.find('account').get('refnum')
print purchaseorder.findall('account')[0].get('refnum')

print purchaseorder.find('item/name')
print purchaseorder.find('item/name').text

print ElementTree(item).getroot().find('name').text
print ElementTree(file='book.xml').getroot().find('item/description').text

for element in purchaseorder.getiterator():
    print element.tag


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

if __name__ == "__main__":
    dump(indet(purchaseorder))
    book.write('book.xml', "utf-8")