_ElementInterface實例沒有屬性'tostring'

Question

下面的代碼會生成此錯誤。我無法弄清楚爲什麼。如果ElementTree解析，爲什麼它沒有tostring？ http://docs.python.org/library/xml.etree.elementtree.html#xml.etree.ElementTree.ElementTree

from xml.etree.ElementTree import ElementTree 

... 

tree = ElementTree() 
node = ElementTree() 

node = tree.parse(open("my_xml.xml")) 
text = node.tostring() 

Answer 1

tostring是xml.etree.ElementTree模塊，而不是混淆的類似命名的類xml.etree.ElementTree.ElementTree的方法。

from xml.etree.ElementTree import ElementTree 
from xml.etree.ElementTree import tostring 

tree = ElementTree() 
node = tree.parse(open("my_xml.xml")) 
text = tostring(node) 

Answer 2

你掛不支持ElementTree.tostring()方法存在的文檔。

此外，您致電tree.parse()重新綁定node。

Answer 3

tostring（）實際上是ElementTree模塊的一個功能，而不是ElementTree包裝類的方法。

>>> import xml.etree.ElementTree as ET 
>>> x = ET.fromstring('<xml><one>one</one></xml>') 
>>> x  
<Element xml at 7f749572f710> 
>>> ET.tostring(x) 
'<xml><one>one</one></xml>'