matthias@amy ~ $ dbus-send --session --type=method_call --print-reply --dest=org.gnome.zeitgeist.Engine /org/gnome/zeitgeist/log/activity org.freedesktop.DBus.Introspectable.Introspect
method return sender=:1.127 -> dest=:1.213 reply_serial=2
   string "<?xml version='1.0' encoding='UTF-8'?>
<node name="/org/gnome/zeitgeist/log/activity">
  <interface name="org.freedesktop.DBus.Introspectable">
    <method name="Introspect">
      <arg direction="out" type="s" />
    </method>
  </interface>
  <interface name="org.freedesktop.DBus.Properties">
    <method name="Set">
      <arg direction="in" name="interface_name" type="s" />
      <arg direction="in" name="property_name" type="s" />
      <arg direction="in" name="value" type="v" />
    </method>
    <method name="GetAll">
      <arg direction="in" name="interface_name" type="s" />
      <arg direction="out" type="a{sv}" />
    </method>
    <method name="Get">
      <arg direction="in" name="interface_name" type="s" />
      <arg direction="in" name="property_name" type="s" />
      <arg direction="out" type="v" />
    </method>
  </interface>
  <interface name="org.gnome.zeitgeist.Log">
    <method name="InsertEvents">
      <arg direction="in" name="events" type="a(asaasay)" />
      <arg direction="out" type="au" />
    </method>
    <method name="DeleteLog">
    </method>
    <method name="FindRelatedUris">
      <arg direction="in" name="time_range" type="(xx)" />
      <arg direction="in" name="event_templates" type="a(asaasay)" />
      <arg direction="in" name="result_event_templates" type="a(asaasay)" />
      <arg direction="in" name="storage_state" type="u" />
      <arg direction="in" name="num_events" type="u" />
      <arg direction="in" name="result_type" type="u" />
      <arg direction="out" type="as" />
    </method>
    <method name="RemoveMonitor">
      <arg direction="in" name="monitor_path" type="o" />
    </method>
    <method name="FindEvents">
      <arg direction="in" name="time_range" type="(xx)" />
      <arg direction="in" name="event_templates" type="a(asaasay)" />
      <arg direction="in" name="storage_state" type="u" />
      <arg direction="in" name="num_events" type="u" />
      <arg direction="in" name="result_type" type="u" />
      <arg direction="out" type="a(asaasay)" />
    </method>
    <method name="FindEventIds">
      <arg direction="in" name="time_range" type="(xx)" />
      <arg direction="in" name="event_templates" type="a(asaasay)" />
      <arg direction="in" name="storage_state" type="u" />
      <arg direction="in" name="num_events" type="u" />
      <arg direction="in" name="result_type" type="u" />
      <arg direction="out" type="au" />
    </method>
    <method name="DeleteEvents">
      <arg direction="in" name="event_ids" type="au" />
      <arg direction="out" type="(xx)" />
    </method>
    <method name="Quit">
    </method>
    <method name="GetEvents">
      <arg direction="in" name="event_ids" type="au" />
      <arg direction="out" type="a(asaasay)" />
    </method>
    <method name="InstallMonitor">
      <arg direction="in" name="monitor_path" type="o" />
      <arg direction="in" name="time_range" type="(xx)" />
      <arg direction="in" name="event_templates" type="a(asaasay)" />
    </method>
  <property access="read" name="version" type="iii" /><property access="read" name="extensions" type="as" /></interface>
</node>"
matthias@amy ~ $ dbus-send --session --type=method_call --print-reply --dest=org.gnome.zeitgeist.Engine /org/gnome/zeitgeist/log/activity org.gnome.zeitgeist.Log.DeleteLog
Error org.freedesktop.DBus.Python.AttributeError: Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.7/dbus/service.py", line 702, in _message_cb
    retval = candidate_method(self, *args, **keywords)
  File "/usr/share/zeitgeist/_zeitgeist/engine/remote.py", line 359, in DeleteLog
    self._engine.delete_log()
AttributeError: ZeitgeistEngine instance has no attribute 'delete_log'

matthias@amy ~ $