i am parsing the XML located at this link:
I need to access the data inside the node and it seems like the program I have written is telling me that there is nothing inside the node. Here is my code:
import urllib
import xml.etree.ElementTree as ET
#prompt for link where xml data resides
#Use this link for testing: http://python-data.dr-chuck.net/comments_42.xml
url = raw_input('Enter URL Link: ')
#open url and prep for parsing
data = urllib.urlopen(url).read()
#read url data and convert to XML Node Tree for parsing
comments = ET.fromstring(data)
#the comment below is part of another approach to the solution
#both approaches are leading me into the same direction
#it appears as if the data inside the node is not being parsed/extracted
#counts = comments.findall('comments/comment/count')
for count in comments.findall('count'):
print comments.find('count').text
When i print out the 'data' variable alone, i get the complete XML tree. However, when I try to access the data inside a particular node, the node comes back empty.
I also tried printing the following code to see what data I would get back:
for child in comments:
print child.tag, child.attrib
the output i got was:
note {} comments {}
What am i doing wrong, and what am i missing?
one of the errors i get when trying a different looping strategy of accessing the node is this:
Traceback (most recent call last):
File "xmlextractor.py", line 16, in <module>
print comments.find('count').text
AttributeError: 'NoneType' object has no attribute 'text'
Please help and thanks!!!
UPDATE:
Ive realized in looking through the etree docs for python that my approach has been trying to 'get' the node attributes instead of the contents of the nodes. I still havent found an answer but i am definitely closer!!!
2nd UPDATE:
so i tried out this code:
import urllib
import xml.etree.ElementTree as ET
#prompt for link where xml data resides
#Use this link for testing: http://python-data.dr-chuck.net/comments_42.xml
url = raw_input('Enter URL Link: ')
#open url and prep for parsing
data = urllib.urlopen(url).read()
#read url data and convert to XML Node Tree for parsing
comments = ET.fromstring(data)
counts = comments.findall('comments/comment/count')
print len(counts)
for count in counts:
print 'count', count.find('count').text
from above, when i run this code my:
print len(counts)
outputs that i have 50 nodes in my counts list, but i still get the same error:
Traceback (most recent call last):
File "xmlextractor.py", line 18, in <module>
print 'count', count.find('count').text
AttributeError: 'NoneType' object has no attribute 'text'
i dont understand why it says that there is no 'text' attribute when i am trying to access the contents of the node.
What am I doing wrong??
A few comments on your approaches:
for count in comments.findall('count'): print comments.find('count').text
comments.findall('count')
returns an empty list because comments
does not have any immediate child elements with the name count
.
for child in comments: print child.tag, child.attrib
Iterates over the immediate child elements of your root node, which are called note
.
# From update #2 for count in comments.findall('comments/comment/count'): print 'count', count.find('count').text
Here, count
is an Element
object representing a count
node which itself does not contain any count
nodes. Thus, count.find('count')
returns a NoneType
object.
If I understand correctly, your goal is to retrieve the text values of the count
nodes. Here are two ways this can be achieved:
for count in comments.findall('comments/comment/count'):
print count.text
for comment in comments.iter('comment'):
print comment.find('count').text
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