Learning Python Networking - Second Edition

Getting images from a URL with urllib

In this example, we can see how to extract images using urllib and regular expressions. The easy way to extract images from a URL is to use the re module to find img elements in the target URL.

You can find the following code in the extract_images_urllib.py file:

#!/usr/bin/env python3from urllib.request import urlopen, urljoinimport redef download_page(url):    return urlopen(url).read().decode('utf-8')def extract_image_locations(page):    img_regex = re.compile('<img[^>]+src=["\'](.*?)["\']',    re.IGNORECASE)    return img_regex.findall(page)if __name__ == '__main__':    target_url = 'http://www.packtpub.com'    packtpub = download_page(target_url)    image_locations = extract_image_locations(packtpub) for src in image_locations: ...