Script STOPS when Source URL is not Status 200

Script STOPS when Source URL is not Status 200

I have a script (see below) that checks (more or less) linkpositions on a website, it works fine but as soon as the source url on which the link lies is not a 200 response it will quit, I just want it to jump ahead to the next or give back some message "error" or even better give me back the http status code. I need a quick solution, if anyone can help me that would be super awesome :)
URLs.csv = list of websites that contain a link to a certain page
domain.com = domain for which to check whether a link is there or not and if yes where is it located roughly.
import csv
from lxml import html

with open('URLs.csv', 'r') as csvfile:
    urls = [row[0] for row in csv.reader(csvfile)]

for url in urls:
    print url

    doc = html.parse(url)
    if doc.xpath('//a[contains(@href,"domain.com")]'):
        for anchor_node in doc.xpath('//a[contains(@href,"finanzen.de")]'):
            if anchor_node.xpath('./ancestor::div[contains(@class, "sidebar")]'):
                print 'Sidebar'
            elif anchor_node.xpath('./parent::div[contains(@class, "widget")]'):
                print 'Sidebar'
            elif anchor_node.xpath('./ancestor::div[contains(@id, "sidebar")]'):
                print 'Sidebar'           
            elif anchor_node.xpath('./ancestor::div[contains(@class, "comment")]'):
                print 'Kommentar'
            elif anchor_node.xpath('./ancestor::div[contains(@id, "comment")]'):
                print 'Kommentar'
            elif anchor_node.xpath('./ancestor::div[contains(@class, "foot")]'):
                print "Footer"
            elif anchor_node.xpath('./ancestor::div[contains(@id, "foot")]'):
                print "Footer"
            elif anchor_node.xpath('./ancestor::div[contains(@class, "post")]'):
                print "Contextual"
            else:
                print 'Unidentified Link'
        else:
            print 'Link is Dead'