from django.shortcuts import render
from django.http import JsonResponse

def button(request):
    PRESSED = 'pressed'
    try:
        request.session[PRESSED]
    except KeyError:
        request.session[PRESSED] = 0

    if request.method == "POST":
        request.session[PRESSED] += 1
        return JsonResponse({PRESSED: request.session[PRESSED]})
    return render(request, "ui/button.html", {PRESSED: request.session[PRESSED]})