Python uses ElementTree to process XML files

In Python, as a general rule, we should use elementtree to process XML files,ElementTree from Python 2.5 as a standard module. In general, the XML file size is moderate and the performance requirements are not very stringent.

The following explains how to manipulate XML through ElementTree;

1. Introduction of libraries
You need to use 3 classes, elementtree,element, and wrapper classes that create subclasses subelement

Try:    import xml.etree.cElementTree as etexcept importerror:    import Xml.etree.ElementTree as ET

Priority is to use more efficient CElementtree,celementtree is the Cython implementation of ElementTree, faster, consumes less memory, performance is more dominant, in the actual use of the process should try to prioritize the use of celementtree.

2. Read in and parse
Tree = ElementTree (file=xmlfile)
root = Tree.getroot ()
After reading, the tree is the type of ElementTree, obtaining the XML root node using the Getroot () method;

XML sample file:
<item sid= ' 1712 ' name = ' Big cc ' >
<a id=1></a>
<a id=2></a>
</item>

3. Get your son's knot point
Find all child nodes of element:
Aarry = Item.findall (' a ')
You can also use GetChildren ():
Childs = Item.getchildren ()
For subitem in Childs:
Print subitem.get (' id ')

4. Insert your son's knot
Method One:
Item = Element ("item", {' Sid ': ' 1713 ', ' name ': ' Ityouhui '})
Root.append (item)
Method Two:
SE (Root, ' item ', {' sid ': ' 1713 ', ' name ': ' Ityouhui '})
The benefit of Fayi is that you can continue the operation on item after you insert it. Law two is simple in writing, in which SE is subelement, making a statement in the introduction;

5. Operation Properties
Get a property value for element (eg: get the name of item)
Print Root.find (' Item/name '). Text
Print item.get (' name ')
Get all attributes of element
Print Item.items () # [(' Sid ', ' 1712 '), (' Name ', ' Big cc ')]
Print Item.attrib # {' sid ': ' 1712 ', ' name ': ' Big cc '}

This article explains how to manipulate XML through ElementTree.

1. Introduction of libraries
You need to use 3 classes, elementtree,element, and wrapper classes that 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 in and parse
Tree = ElementTree (file=xmlfile)
root = Tree.getroot ()
After reading, the tree is the type of ElementTree, obtaining the XML root node using the Getroot () method;

XML sample file:
<item sid= ' 1712 ' name = ' Big cc ' >
<a id=1></a>
<a id=2></a>
</item>

3. Get your son's knot point
Find all child nodes of element:
Aarry = Item.findall (' a ')
You can also use GetChildren ():
Childs = Item.getchildren ()
For subitem in Childs:
Print subitem.get (' id ')

4. Insert your son's knot
Method One:
Item = Element ("item", {' Sid ': ' 1713 ', ' name ': ' Ityouhui '})
Root.append (item)
Method Two:
SE (Root, ' item ', {' sid ': ' 1713 ', ' name ': ' Ityouhui '})
The benefit of Fayi is that you can continue the operation on item after you insert it. Law two is simple in writing, in which SE is subelement, making a statement in the introduction;

5. Operation Properties
Get a property value for element (eg: get the name of item)
Print Root.find (' Item/name '). Text
Print item.get (' name ')
Get all attributes of element
Print Item.items () # [(' Sid ', ' 1712 '), (' Name ', ' Big cc ')]
Print Item.attrib # {' sid ': ' 1712 ', ' name ': ' Big cc '}

Python uses ElementTree to process XML files