About Modifying Template Context Variables Globally

from django.shortcuts import render

def home(request):
    request.user_settings = {
        "show_ads": True,
    }
    return render(request, "home.html", {})

def modify_user_settings(request):
    if hasattr(request, "user_settings"):
        request.user_settings["expand_sidebar"] = (
            request.session.get("expand_sidebar")
        )
    return {}

{% extends "base.html" %}

{% block content %}
    <nav {% if request.user_settings.expand_sidebar %}
        class="open"
    >...</nav>
    {% if request.user_settings.show_ads %}
        {% include "ads/ad.html" %}
    {% endif %}
{% endblock %}