Full text search using Python, with autocorrection

search.py

from feed.models import Post
import regex, datetime
from autocorrect import Speller

SEARCH_REGEX = r'\s({})[\s.,!?:)\-&*\"\';]'
ESCAPED_QUERIES = ['a', 'and', 'the', 'is', 'i']

def get_posts_for_query(request, qs):
    now = datetime.datetime.fromtimestamp(int(request.GET.get('time')) / 1000)
    spell = Speller()
    qs = spell(qs)
    qsplit = qs.split(' ')
    posts = Post.objects.filter(content__icontains=qs, private=False, published=True, date_posted__lte=now)
    for q in qsplit:
        posts = posts.union(Post.objects.filter(content__icontains=q, private=False, published=True, date_posted__lte=now))
    posts = posts.order_by('-date_posted')
    pos = []
    for post in posts:
        count = 0
        matches = regex.findall(SEARCH_REGEX.format(qs), post.content, flags=regex.IGNORECASE | regex.BESTMATCH)
        count = count + len(matches)
        for q in qsplit:
            matches = regex.findall(SEARCH_REGEX.format(q), post.content, flags=regex.IGNORECASE | regex.BESTMATCH)
            for match in matches:
                if not match in ESCAPED_QUERIES:
                    count = count + 1
        if count > 0:
            pos = pos + [(post.id, count)]
    pos = sorted(pos, key = lambda x: x[1], reverse=True)
    posts = []
    for post, count in pos:
        post = Post.objects.get(id=post)
        posts = posts + ([post] if post.public or request.user.is_authenticated and post.author in request.user.profile.subscriptions.all() or request.user.is_authenticated and request.user.profile.vendor else [])
    return posts