Hello.
I like to make a program using DeviceKit daemon by python-dbus.
So I made a sample program to call DeviceKit method and connect
Devicekit signal.
this is sample program
import gobject
import dbus
import dbus.service
import dbus.mainloop.glib
devkit_bus = "org.freedesktop.DeviceKit"
devkit_objpath = "/org/freedesktop/DeviceKit"
devkit_iface = "org.freedesktop.DeviceKit"
def on_device_event (*args, **kwds):
print "on_device_event"
if __name__ == "__main__":
dbus.mainloop.glib.DBusGMainLoop (set_as_default=True)
bus = dbus.SystemBus ()
proxy = bus.get_object (devkit_bus, devkit_objpath)
iface = dbus.Interface (proxy, devkit_iface)
for device in iface.EnumerateBySubsystem (["usb"]):
print device
print proxy.Introspect
(dbus_interface="org.freedesktop.DBus.Introspectable")
iface.connect_to_siganal ("DeviceEvent", on_device_event)
mainloop = gobject.MainLoop ()
print "running IO Manager"
mainloop.run ()
================ result =======================
ERROR:dbus.connection:Unable to set arguments ('DeviceEvent', <function
on_device_event at 0xb7a032cc>) according to signature None: <type
'exceptions.TypeError'>: Don't know how which D-Bus type to use to
encode type "function"
Traceback (most recent call last):
File "iomgr.py", line 20, in <module>
proxy.connect_to_siganal ("DeviceEvent", on_device_event)
File "/var/lib/python-support/python2.5/dbus/proxies.py", line 68, in
__call__
return self._proxy_method(*args, **keywords)
File "/var/lib/python-support/python2.5/dbus/proxies.py", line 140, in
__call__
**keywords)
File "/var/lib/python-support/python2.5/dbus/connection.py", line 597,
in call_blocking
message.append(signature=signature, *args)
TypeError: Don't know how which D-Bus type to use to encode type "function"
I saw a error! calling a DeviceKit method(EnumerateBySubsystem) work
well, but connecting a DeviceKit signal(DeviceEvent) don't work well.
I have tried to connect a HAL signal, but it work well.
what is a problem? please help me!
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