python - How do I do parsing in Django templates? -

post = { sizes: [ { w:100, title="hello"}, {w:200, title="bye"} ] } 

suppose pass django templates. now, want display title width = 200. how can that, without doing brute-force way:

{{ post.sizes.1.title }} 

i want parsed way.

a neat way filter template tag.

from django.template import library  register = library()  @register.filter('titleofwidth') def titleofwidth(post, width):     """     title of given width of post.      sample usage: {{ post|titleofwidth:200 }}     """      in post['sizes']:         if i['w'] == width:             return i['title']     return none 

that should go in templatetags package, postfilters.py, , {% load postfilters %} in template.

naturally alter give correct sizes object , {% post|detailsofwidth:200 postdetails %}{{ postdetails.something }}, {{ postdetails.title }}{% endwith %}.