@classmethod
def comment(cls, comment, drop_incompat_keys=False):
    """Patch a comment object"""
    comment['created_time'] = str(int(comment.get('created_at')))
    from_user = {'username': comment['user']['username'], 'profile_picture':
        comment['user']['profile_pic_url'], 'id': str(comment['user']['pk']
        ), 'full_name': comment['user']['full_name']}
    comment['from'] = from_user
    comment['id'] = str(comment['pk'])
    if drop_incompat_keys:
        cls._drop_keys(comment, ['bit_flags', 'content_type', 'created_at',
            'created_at_utc', 'media_id', 'pk', 'status', 'type', 'user',
            'user_id'])
    return comment
