How can I permanently update Django settings using views and forms?

Hi there,

I am trying to update a variable defined in settings.py through the front-end using a combination of views and forms, and I need the change to be permanent (i.e. persist across server restarts).

For example, in my settings.py I have:

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# My personal settings
NO_OF_DAYS = 0

In my forms.py I have the following form:

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def class SettingsForm(forms.Form):
    no_of_days = forms.CharField(max_length=254)

My views.py contains an update view similar to this:

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from django.conf import settings
from .forms import SettingsForm

class UpdateSettings(View):
    def get(self, request):
        settings_form = SettingsForm()
        return render(request, "settings-template.html", {"form": settings_form})

    def post(self, request):
        settings_form = SettingsForm(request.POST)
        if settings_form.is_valid():
            form_data = settings_form.cleaned_data

            settings.NO_OF_DAYS = int(form_data["no_of_days"])  # I want this change to be stored permanently
            return redirect("/success/")

The issue is that updating the settings variable in this way only affects the runtime variable, not the actual settings.py file. How can I achieve a permanent update to settings.py using the data from a form submission?