CODEWITHSUNDEEP
pythonxml
user181351
user181351

Reputation:

xml.dom.minidom python issue

from xml.dom.minidom import *

resp = "<title> This is a test! </title>"

rssDoc = parseString(resp)

titles = rssDoc.getElementsByTagName('title')

moo = ""

for t in titles:
    moo += t.nodeValue;

Gives the following error:

main.py, line 42, in
       get moo += t.nodeValue;
TypeError: cannot concatenate 'str' and 'NoneType' objects

Upvotes: 0

Views: 490

Answers (3)

Nicholas Riley
Nicholas Riley

Reputation: 44321

The <title> node contains a text node as a subnode. Maybe you want to iterate through the subnodes instead? Something like this:

from xml.dom.minidom import *

resp = "<title> This is a test! </title>"

rssDoc = parseString(resp)

titles = rssDoc.getElementsByTagName('title')

moo = ""

for t in titles:
    for child in t.childNodes:
        if child.nodeType == child.TEXT_NODE:
            moo += child.data
        else:
            moo += "not text "

print moo

For learning xml.dom.minidom you might also check out the section in Dive Into Python.

Upvotes: 2

Frank
Frank

Reputation: 10571

Because is not a text node, but an element node. The text node which contains the " This is a test! " string is actually a child node of this element node.

So you can try this (untested, not assumes existence of the text node):

if t.nodeType == t.ELEMENT_NODE:
    moo += t.childNodes[0].data

Upvotes: 1

SilentGhost
SilentGhost

Reputation: 319571

because t.nodeType is not equal to t.TEXT_NODE of course.

Upvotes: 0

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