How can I use a variable to lookup in a tuple? (Django) - django

Question

I have a tuple, such that
{{VISIBILITY_CHOICES.1.1}}
Outputs "hello".
I have model "task" with a attribute "visibility_status", and in a loop, say all the iterations of task.visibility_status outputs 1
{{task.visibility_status}}
Outputs 1.
How do I use this task.visibility_status inside the lookup of the tuple? Something like VISIBILITY_CHOICES[task.visibility_status][1] in a different language.
I'm very new to django... Thanks a lot.
edit:
The code I was running:
{% for task in tasks %}
<div class="post">
<h1>{{ task.subject }}</h1>
<div class="date">
<p>Due: {{ task.due_date }}</p>
<p>Assigned to: {{task.assigned_to}}</p>
</div>
<p>{{ task.text_area|linebreaks }}</p>
{% with args=""|add:task.visibility_status|add:",1" %}
<p>Visibility Status: {{VISIBILITY_CHOICES|get_index:args}}({{ task.visibility_status }})</p>
{% endwith %}
<p>Case Status: {{ task.case_status }}</p>
<div class="date">
<p>Created: {{ task.created_date }} by {{ task.author }}</p>
</div>
</div>
{% endfor %}

Answer 1

Although the builtin name tuple may not have any syntactic meaning in a template, I'll use my_tuple in its place in the code below.
I've used with to create a context that builds the args for indexing my_tuple (i.e task.visibility_status and 1): :
{% with x=task.visibility_status|stringformat:"s" %}
{% with args=x|add:",1" %}
{{ my_tuple|get_index:args }}
{% endwith %}
{% endwith %}
And in the custom template filter, I've splitted and recreated the arguments and used indexing in plain python to return the item at the index:
from django import template
register = template.Library()
#register.filter
def get_index(my_tuple, args):
arg1, arg2 = args.split(',') # split on the comma separator
try:
i = int(arg1)
j = int(arg2)
return my_tuple[i][j] # same as my_tuple[task.status][1]
except:
return None