Question

i am reading an xml file using xpath the issue its returning null.

main.py

#!/usr/bin/python
import sys
from util import xml_util

def main():

    try:
        xml = XMLReader('test.xml')
        x = xml.getitem('numbers/x')
    print x
        return 0
    except:
        return -1


if __name__ == '__main__':
    sys.exit(main())

xml_util.py

from lxml import etree

class XMLReader:
    "Parse file and read data using find(path)"
    def __init__(self,fname):
        self.tree = etree.parse(fname)
        self.root = self.tree.getroot()

    def getitem(self,path,converter=str):
        return converter(self.root.find(path).text)

    def getlist(self,path,converter=str):
        return [converter(item.text) for item in self.root.find(path)]

test.xml

<mystuff>
   <numbers>
        <x>3.14</x>
        <y>42</y>
        <z>11</z>
   </numbers>
</mystuff>

The XMLReader class is received from this post https://stackoverflow.com/questions/4357494/how-do-i-read-data-using-lxml-in-python

Answer 1

#!/usr/bin/python
import sys
from xml_util import XMLReader

def main():

    try:
        xml = XMLReader('test.xml')
        x = xml.getitem('numbers/x')
    print x
        return 0
    except:
        return -1


if __name__ == '__main__':
    sys.exit(main())

Edit

If you’re still haveing problems and you set up a module with __init__.py and are trying to import xml_util then reference your reader xml_util.XMLReader or change your import statment to from util.xml_util import XMLReader