Extracting Data from XML: The program will prompt for a URL, read the XML data from that URL using urllib and then parse and extract the comment counts from the XML data, compute the sum of the numbers in the file.

py4e_ex_13

from urllib import request
import xml.etree.ElementTree as ET

url = 'http://python-data.dr-chuck.net/comments_24966.xml'
print ("Retrieving", url)
html = request.urlopen(url)
data = html.read()
print("Retrieved",len(data),"characters")

tree = ET.fromstring(data)
results = tree.findall('comments/comment')
icount=len(results)
isum=0

for result in results:
    isum += float(result.find('count').text)
print(icount)
print(isum)

why I keep having this error ?
('NoneType' object has no attribute 'text')
import urllib.request, urllib.parse, urllib.error
import ssl
import xml.etree.ElementTree as ET
ctx = ssl.create_default_context()
ctx.check_hostname = False
ctx.verify_mode = ssl.CERT_NONE
Value = input('Enter location: ')
print('Retrieving',Value)
uh = urllib.request.urlopen(Value, context=ctx)
data = uh.read()
data = data.decode()
tree = ET.fromstring(data)
counts = tree.findall('.//count')
print('Retrieved',len(data),'characters')
counter = 0
sum = 0
for elements in counts:
counter += 1
sum = (elements.find('count').text) + sum
print(counter)
print(sum)

i am getting error :-

Traceback (most recent call last):
File "/Users/shantanusoni/Documents/ImpDoc/shekhar/studie_related/Coding_Culture/Python/python-coursera/example.py", line 2, in
import xml.etree.ElementTree as ET
File "/Users/shantanusoni/Documents/ImpDoc/shekhar/studie_related/Coding_Culture/Python/python-coursera/xml.py", line 2, in
import xml.etree.ElementTree as ET
ModuleNotFoundError: No module named 'xml.etree'; 'xml' is not a package

Plz help me