all: changes from python 2 syntax to python3 and removing dead code

There were python 2 methods that are not used anymore so now
it's in python 3. Added helper fuctions so that the code is more clear

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/540

examples/python/dbus/get-active-connection-uuids.py

@@ -6,9 +6,8 @@
 
 import dbus
 
-# This example takes a device interface name as a parameter and tells
-# NetworkManager to disconnect that device, closing down any network
-# connection it may have
+# This example lists all of the active connections
+# the system is connected to and prints it out
 
 bus = dbus.SystemBus()
 
@@ -16,23 +15,15 @@ bus = dbus.SystemBus()
 m_proxy = bus.get_object(
     "org.freedesktop.NetworkManager", "/org/freedesktop/NetworkManager"
 )
-manager = dbus.Interface(m_proxy, "org.freedesktop.NetworkManager")
 mgr_props = dbus.Interface(m_proxy, "org.freedesktop.DBus.Properties")
 
-s_proxy = bus.get_object(
-    "org.freedesktop.NetworkManager", "/org/freedesktop/NetworkManager/Settings"
-)
-settings = dbus.Interface(s_proxy, "org.freedesktop.NetworkManager.Settings")
-
-# Find the device the user wants to disconnect
+# Find all active connections
 active = mgr_props.Get("org.freedesktop.NetworkManager", "ActiveConnections")
+
 for a in active:
     a_proxy = bus.get_object("org.freedesktop.NetworkManager", a)
 
-    # Get the UUID directly; apps could use this to perform certain operations
-    # based on which network you're connected too
     a_props = dbus.Interface(a_proxy, "org.freedesktop.DBus.Properties")
-    uuid = a_props.Get("org.freedesktop.NetworkManager.Connection.Active", "Uuid")
 
     # Grab the connection object path so we can get all the connection's settings
     connection_path = a_props.Get(
@@ -45,7 +36,11 @@ for a in active:
     settings = connection.GetSettings()
     print(
         "%s (%s) - %s"
-        % (settings["connection"]["id"], uuid, settings["connection"]["type"])
+        % (
+            settings["connection"]["id"],
+            settings["connection"]["uuid"],
+            settings["connection"]["type"],
+        )
     )
 
 if len(active) == 0: