Re: Gio.DBusObjectManagerClient not updating

[Hayden Lau <HaydenL aercoustics com>]

Sorry all, this is a repeat email that got caught up in the spam filtering system. I already had some 
responses earlier (after I joined the mailing list).

Thanks,
Hayden

On 2018-03-06, 1:36 PM, "python-hackers-list on behalf of Hayden Lau" <python-hackers-list-bounces gnome org 
on behalf of HaydenL aercoustics com> wrote:

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    Hello,
    
    I understand this is a dev mailing list, but I’m not sure where to post this question otherwise.
    
    I’m attempting to write an application that interacts with UDisks2 over DBus with PyGObject. However, I’m 
finding that after instantiating the proper Gio.DBusObjectManagerClient, I seem to be unable to get updates 
on the ObjectManager’s state. Am I missing something? The only example code that I could find that had 
similar functionality was in udiskie (https://github.com/coldfix/udiskie), but that application uses 
Gio.DBusProxy directly. Is that the recommended approach? My (non-working) proof of concept code pasted 
below. It prints the initial set of objects reported by the ‘org.freedesktop.UDisks2’ object manager, but 
does not print changes (either via signal or polling) when disks are added or removed.
    
    Thank you,
    Hayden Lau
    
    ========================
    from time import sleep
    import gi
    gi.require_version('Gio', '2.0')
    from gi.repository import Gio
    
    udisks2 = Gio.DBusObjectManagerClient.new_for_bus_sync(
        Gio.BusType.SYSTEM,
        Gio.DBusObjectManagerClientFlags.NONE,
        'org.freedesktop.UDisks2',
        '/org/freedesktop/UDisks2',
        None,
        None,
        None
    )
    
    def new_obj_handler(obj):
        print('New Object: ', obj)
    
    def new_iface_handler(obj):
        print('New Interface: ', obj)
    
    def get_paths(objmgr):
        return [obj.get_object_path() for obj in objmgr.get_objects()]
    
    udisks2.connect('interface-added', new_iface_handler)
    udisks2.connect('object-added', new_obj_handler)
    
    paths = []
    while(True):
        if paths != get_paths(udisks2):
            paths = get_paths(udisks2)
            print(paths)
        sleep(1)
    
    
    
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