Soup example

soup.py

def insert_mid_related_articles(content, urls):
    soup = bs4.BeautifulSoup(content, 'html.parser')
    paragraphs = soup('p')
    words_count = 0
    if len(paragraphs) > 1:
        for p in paragraphs:
            words = filter(bool, re.split('\W+', p.string))
            words_count += len(words)
    if words_count > 300:
        middle = len(paragraphs) / 2
        for n, p in enumerate(paragraphs, 1):
            if n == middle:
                ul = soup.new_tag('ul', **{'class': 'op-related-articles'})
                for url in urls:
                    li = soup.new_tag('li')
                    a = soup.new_tag('a', href=url)
                    li.append(a)
                    ul.append(li)
                p.insert_after(ul)
    return soup.decode(pretty_print=False)