Custom errors page in Django 2.0 >=

urls.py

from django.conf.urls import (
    handler400, handler403, handler404, handler500
)

handler400 = 'myapp.views.handler400'
handler403 = 'myapp.views.handler403'
handler404 = 'myapp.views.handler404'
handler500 = 'myapp.views.handler500'

urlpatterns = [
  ...
]

views.py

from django.shortcuts import render

'''
    Be sure of the correct path of html error page.
    it's an example for django_project/templates/errors
    
    errors/400.html
    ...
'''

def handler400(request, exception):
    return render(request, 'errors/400.html', status=400)

def handler403(request, exception):
    return render(request, 'errors/403.html', status=403)

def handler404(request, exception):
    return render(request, 'errors/404.html', status=404)

def handler500(request):
    return render(request, 'errors/500.html', status=500)