Django snippets

import re

from trac.wiki.formatter import *

from django.template import Library, Node, Template, Context
from django.template.defaultfilters import stringfilter
from django.template.loader import render_to_string
from django.utils.safestring import mark_safe

from photologue.models import Photo

def get_photologue_html(size,image):
        image = get_image(image)
        if not image:
                return "Bad image name"
        if size.lower() == "thumb":
                template = "photologue/thumb_snippet.html"
        else:
                template = "photologue/image_snippet.html"

        return render_to_string(template,{'image': image })

pattern = re.compile(r'\[\[([^:]+):(.+)\]\]')

@register.filter
@stringfilter

def yeagowiki(content):
        content = pattern.sub(lambda match: get_photologue_html(match.group(1),match.group(2)),content)
        return mark_safe(content)