<form method="POST" action="{% url 'my_view' %}">
  {% csrf_token %}
  <input type="checkbox" name="my_switch">
  <button type="submit">提交</button>
</form>

from django.urls import path
from . import views

urlpatterns = [
    path('my_view/', views.my_view, name='my_view'),
]

from django.shortcuts import render

def my_view(request):
    if request.method == 'POST':
        my_switch = request.POST.get('my_switch')
        # 在这里可以根据my_switch的值进行相应的处理
        return render(request, 'result.html', {'my_switch': my_switch})
    else:
        return render(request, 'form.html')

{% if my_switch %}
  <p>开关已打开</p>
{% else %}
  <p>开关已关闭</p>
{% endif %}