def create_group(group_name, articles, num_comments, clone_and_sample):
"""
Create group from articles (sampling its comments)
"""
try:
group = Group.objects.get(name=group_name)
except DoesNotExist:
group = Group(name=group_name)
if clone_and_sample:
group.articles = [
clone_and_sample_comments(art, num_comments) for art in articles
]
else:
group.articles = articles
group.save()
return group
