python - Template include tag: Choose another template if it does not exist -

i include different template depending request. example:

suppose request has:

request.country = 'spain' request.city = 'madrid' 

i want include "index.html" view but:

---- if myapp/index_madrid.html exist

{% include "myapp/index_madrid.html" %} 

---- elif myapp/index_spain.html exist

   {% include "myapp/index_spain.html" %} 

---- else go default version

   {% include "myapp/index.html" %} 

how can achieve behaviour in transparent way? mean, like:

{% my_tag_include "myapp/index.html" %} {% my_tag_include "myapp/another_view.html" p='xxx' only%} {% my_tag_include "myapp/any_view.html" p='sss' a='juan' %} 

and achieve cascading loading explained before.

thanks

one possibility implement kind of logic in view:

# views.py django.template.loader import select_template  class myview(view):     def get(self, request):         include_template = select_template([             'myapp/index_{}.html'.format(request.city),             'myapp/index_{}.html'.format(request.country),             'myapp/index.html'         ])          ctx = {             'include_template': include_template         }          return render(request, 'myapp/base.html', ctx)  # myapp/base.html {% include include_template %} 

select_template() return first template in passed list exists. include tag supports including compiled templates beginning django 1.7, should work fine if on 1.7 or above.

---

update: reuse across multiple views

# utils.py django.template.loader import select_template  def get_approriate_template(tokens, app_name):     templates = ['{}/index_{}.html'.format(app_name, x) x in tokens]     templates.append('{}/index.html'.format(app_name))     return select_template(templates)  # views.py .utils import get_approriate_template  class myview(view):     def get(self, request):         tokens = [request.city, request.country]         ctx = {             'include_template': get_appropriate_template(tokens, app_name='myapp')         }          return render(request, 'myapp/base.html', ctx) 

---

update: rendering template template tag

# templatetags/myapp_extras.py django import template  register = template.library()  @register.simple_tag(takes_context=true) def my_tag_include(context):     django.template.loader import select_template     include_template = select_template([         'myapp/index_{}.html'.format(context['request'].city),         'myapp/index_{}.html'.format(context['request'].country),         'myapp/index.html'     ])     return include_template.render(context)  # myapp/base.html {% load myapp_extras %} {% my_tag_include %}