Python 2.5.4 - ImportError: No module named etree.

问题:

I'm running Python 2.5.4 on Windows and I keep getting an error when trying to import the ElementTree or cElementTree modules. The code is very simple (I'm following a tutorial):

import xml.etree.ElementTree as xml

root = xml.Element('root')
child = xml.Element('child')
root.append(child)
child.attrib['name'] = "Charlie"
file = open("test.xml", 'w')
xml.ElementTree(root).write(file)
file.close()

I get the error message when I run it from the cmd or but not when I directly try it from the Python interpreter.

Traceback (most recent call last):  
File "C:\xml.py", line 31, in <module>
  import xml.etree.ElementTree as xml   
File "C:\xml.py", line 31, in <module>
  import xml.etree.ElementTree as xml
ImportError: No module named etree.ElementTree

Also, I checked and the module is there in C:\Python25\Lib\xml\etree

回答1:

You missed the very important line in the tutorial

import xml.etree.ElementTree as xml

This makes xml.etree.ElementTree now known as xml throughout the module.

I happen to have python 2.5.4 and I have verified that the same code you have above works:

user@Comp test$ cat test.py 
import xml.etree.ElementTree as xml

root = xml.Element('root')
child = xml.Element('child')
root.append(child)
child.attrib['name'] = "Charlie"
file = open("test.xml", 'w')
xml.ElementTree(root).write(file)
file.close()

user@Comp test$ /usr/bin/python2.5 --version
Python 2.5.4
user@Comp test$ /usr/bin/python2.5 test.py 
user@Comp test$ cat test.xml 
<root><child name="Charlie" /></root>user@Comp test$ 

So check and make sure you're running python 2.5.4 and if you are try reinstalling. The problem is not that it's python 2.5.4 or your code. It's some installation problem, you're running a different version of python, or there's some other strange problem.

回答2:

Because your original file name is C:\xml.py

Change the file name to any other name

回答3:

I got the same error report("ImportError: No module named etree.ElementTree") when naming the test file as xml.py. And it got fixed when I renamed it to something else like xmltest.py.

回答4:

I had a funny situation, which may or may not be similarly to this and found my solution. I created my own module for parsing xml files. I put it in my_project_root/utilities/xml.py. When import xml.etree.ElementTree or xml.etree from within this module I would get the error in the title of this posting. It was searching in itself, so from within xml.py it was attempting to import etree.ElementTree, and could not find a package or module named etree. I changed the name of my module to xml_parse.py and deleted my_project_root/utilities/xml.pyc and it worked perfectly. A simple reminder of using caution with module naming conventions.