Python acquires node-read properties by ElementTree operation XML to beautify XML

  This article explains how to parse XML through ElementTree, get the son node, insert the Son node, manipulate the attributes, beautify the XML

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1. The introduction of the library requires 3 classes, elementtree,element, and a wrapper class to create subclasses subelement  from Xml.etree.ElementTree import ElementTree from Xml.etree.ElementTree Import Element from xml.etree.ElementTree import subelement as SE   2. Read and parse tree = ElementTree ( File=xmlfile) root = Tree.getroot () After reading, the tree is the type of ElementTree, get the XML root node to use the Getroot () method;   XML sample file:     code as follows: & Lt;item sid= ' 1712 ' name = ' Big cc '  > <a id=1></a> <a id=2></a> </item>     3 Get a son node to find all the child nodes of the element:       Code as follows: Aarry = Item.findall (' A ') can also use GetChildren (): Childs =  item.getch Ildren ()      for subitem in Childs:            print subitem.get (' id ') &nbsp ;   4. Insert Son node method one:     Copy code code is as follows:  item = Element ("item", {' Sid ': ' 1713 ', ' name ': ' Ityouhui '})  ro Ot.append (item)   Method Two: The code is as follows: SE (Root, ' item ', {' sid ': ' 1713 ', ' name ': ' Ityouhui '})   Fayi The advantage is that you can continue with the item after inserting. The second method is simple in writing, in which SE is subelement, made a statement at the introduction;   5.An Action property gets the value of an attribute of an element (eg: Gets the item's name)     code as follows: Print root.find (' Item/name '). Text print item.get (' name ')   Get element All attributes copy code code as follows: Print Item.items ()       # [(' Sid ', ' 1712 '), (' Name ', ' Big cc ')] Print item.at Trib        # {' sid ': ' 1712 ', ' name ': ' Big cc '}     6. To beautify XML before writing, incoming root calls this function, the written XML file format is neat and beautiful: & nbsp     Code as follows: Indent (root) book.write (xmlfile, ' utf-8 ')         code as follows: # get pretty look def indent (Elem, level=0):     i = "n" + level* " "     If Len (elem):         if not E Lem.text or Not Elem.text.strip ():             Elem.text = i + " "     &NBSP ;   for E on Elem:             indent (e, level+1)         if not e.ta Il or not e.tail.strip ():             E.tail = i     if level and (not Elem.tail O R not Elem.tail.strip ()):         Elem.tail = i     return elem