adding fix for packet_net.py (#891) (#1396)

* adding fix for packet_net.py

* adding changelog fragment

* squashing to fix cascading notifications

Apply suggestions from code review

thanks felixfontein for working with me!

Co-authored-by: Felix Fontein <felix@fontein.de>

adding suggestions from code review (accessing dict in a better way)

modified packet_net fragment to accurate description

Co-authored-by: Felix Fontein <felix@fontein.de>

Co-authored-by: Felix Fontein <felix@fontein.de>
(cherry picked from commit cc7d0f7)

Co-authored-by: elreydetoda <unc741@gmail.com>

changelogs/fragments/891-packet_net-fix-not-subscriptable.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+- packet_net.py inventory script - fixed failure w.r.t. operating system retrieval by changing array subscription back to attribute access (https://github.com/ansible-collections/community.general/pull/891).

scripts/inventory/packet_net.py

@@ -346,9 +346,9 @@ def add_device(self, device, project):
 
         # Inventory: Group by OS
         if self.group_by_operating_system:
-            self.push(self.inventory, device.operating_system['slug'], dest)
+            self.push(self.inventory, device.operating_system.slug, dest)
             if self.nested_groups:
-                self.push_group(self.inventory, 'operating_systems', device.operating_system['slug'])
+                self.push_group(self.inventory, 'operating_systems', device.operating_system.slug)
 
         # Inventory: Group by plan type
         if self.group_by_plan_type:
@@ -395,7 +395,7 @@ def get_host_info_dict_from_device(self, device):
             elif key == 'packet_facility':
                 device_vars[key] = value['code']
             elif key == 'packet_operating_system':
-                device_vars[key] = value['slug']
+                device_vars[key] = value.slug
             elif key == 'packet_plan':
                 device_vars[key] = value['slug']
             elif key == 'packet_tags':