Download the updateinfo.xml from Fedora updates-testing and stable repos and check it for notices with duplicate update IDs.

check_updateinfo.py

# Download the updateinfo.xml from fedora stable & testing repos and check it
# for notices with duplicate update IDs.
import os
import urllib

from yum.update_md import UpdateMetadata

ver = 20

testing_url = 'http://dl.fedoraproject.org/pub/fedora/linux/updates/testing/%d/x86_64/repodata/updateinfo.xml.gz' % ver
stable_url = 'http://dl.fedoraproject.org/pub/fedora/linux/updates/%d/x86_64/repodata/updateinfo.xml.gz' % ver
filename = 'updateinfo.xml.gz'

print('Downloading %s' % stable_url)
urllib.urlretrieve(stable_url, filename='stable-' + filename)
print('Downloading %s' % testing_url)
urllib.urlretrieve(testing_url, filename='testing-' + filename)

umd = UpdateMetadata()
umd.add('stable-' + filename)
umd.add('testing-' + filename)

print('updateinfo.xml.gz loaded')
print('%d notices' % len(umd.get_notices()))

notices = {}

for notice in umd.get_notices():
    id = notice['update_id']
    if id in notices:
        print('Duplicate notice for %s' % id)
        print(notices[id])
    else:
        notices[id] = notice