Parse xml from file using etree works when reading string, but not a file

Question

I am a relative newby to Python and SO. I have an xml file from which I need to extract information. I\'ve been struggling with this for several days, but I think I finally foun

Answer 1

Have you thought of trying beautifulsoup to parse your xml with python:

http://www.crummy.com/software/BeautifulSoup/bs3/documentation.html#Parsing%20XML

There is some good documentation and a healthy online group so support is quite good

A

Answer 2

Your XML file uses a default namespace. You need to qualify your searches with the correct namespace:

identifier = node.findtext('{http://www.eol.org/transfer/content/0.3}identifier')

for ElementTree to match the correct elements.

You could also give the .find(), findall() and iterfind() methods an explicit namespace dictionary. This is not documented very well:

namespaces = {'eol': 'http://www.eol.org/transfer/content/0.3'} # add more as needed

root.findall('eol:identifier', namespaces=namespaces)

Prefixes are only looked up in the namespaces parameter you pass in. This means you can use any namespace prefix you like; the API splits off the eol: part, looks up the corresponding namespace URL in the namespaces dictionary, then changes the search to look for the XPath expression {http://www.eol.org/transfer/content/0.3}identifier instead.

If you can switch to the lxml library things are better; that library supports the same ElementTree API, but collects namespaces for you in a .nsmap attribute on elements.