from bs4 import BeautifulSoup
from post.models import TPost

for t_post in TPost.objects.all():
    entry = t_post.ref_t_entry.first()
    soup = BeautifulSoup(entry.e_content, 'html.parser')
    for html in soup.find_all('html'):
        try:
            pic = html.find('picture').extract()
        except AttributeError:
            # no pic
            continue
        html.replace_with(pic)
    entry.e_content = str(soup)
    entry.save()