Get all the image tags in a given URL and print their URLs.

get-img.py

import sys
import urllib2
import contextlib

from bs4 import BeautifulSoup

if len(sys.argv) < 2:
    print 'Error: Please provide a URL to scrape.'
    sys.exit(1)

URL = sys.argv[1]

with contextlib.closing(urllib2.urlopen(URL)) as r:
    html = r.read()
    soup = BeautifulSoup(html)

    og_image = soup.find('meta', attrs={'property': 'og:image'})
    if og_image:
        print og_image.get('content')
    else:
        for img in soup.find_all('img'):
            print img.get('src')