Ping google django admin button

cp .env/lib/python2.7/site-packages/django/contrib/admin/templates/admin/change_form.html myproject/templates/admin/

--- a/myproject/templates/admin/change_form.html
+++ b/myproject/templates/admin/change_form.html
@@ -28,6 +28,9 @@
 {% block object-tools %}
 {% if change %}{% if not is_popup %}
   <ul class="object-tools">
+    {% for button in buttons %}
+      <li><a href="{{ button.0 }}/">{{ button.1 }}</a></li>
+    {% endfor %}
     {% block object-tools-items %}

from django.contrib import admin, messages
from django.contrib.sitemaps import ping_google

from django.http import HttpResponseRedirect


class ButtonableModelAdmin(admin.ModelAdmin):
    """
    A subclass of this admin will let you add buttons (like history) in the
    change view of an entry.
    More: https://djangosnippets.org/snippets/1016/
    admin/change_form.html template is modified.
    """

    buttons = []

    def change_view(self, request, object_id, extra_context={}):
        extra_context['buttons'] = self.buttons
        return super(ButtonableModelAdmin, self).change_view(
                request=request, object_id=object_id, extra_context=extra_context)

    def button_view_dispatcher(self, request, object_id, command):
        obj = self.model._default_manager.get(pk=object_id)
        return getattr(self, command)(request, [obj]) \
                or HttpResponseRedirect(request.META['HTTP_REFERER'])

    def get_urls(self):

        from django.conf.urls import patterns, url
        from django.utils.functional import update_wrapper

        def wrap(view):
            def wrapper(*args, **kwargs):
                return self.admin_site.admin_view(view)(*args, **kwargs)
            return update_wrapper(wrapper, view)

        info = self.model._meta.app_label, self.model._meta.module_name

        return patterns('',
            *(url(r'^(\d+)/(%s)/$' % but[0], wrap(self.button_view_dispatcher)) for but in self.buttons)
        ) + super(ButtonableModelAdmin, self).get_urls()


class MyModelAdmin(ButtonableModelAdmin):

    def _ping_google(self, request, queryset):
        try:
            ping_google()
            messages.success(
                request,
                'Sitemaps were submitted.')
        except Exception:
            messages.warning(
                request,
                'Sitemaps were not submitted.')

    _ping_google.short_description = 'Ping google'

    buttons = [(_ping_google.func_name, _ping_google.short_description)]