Access tuple in django template

 t=[]
 t.append(("a",1))
 t.append(("b",2))
 t.append(("c",3))
 return render_to_response(t.html,  context_instance=RequestContext(request, {'t':t}))

How can I access a value of t in Django templates without using a for loop? I have tried the following and it doesn't seem to work:

    alert('{{t[a]}}');
    alert('{{t[c]}}');