dbus.proxies module

class dbus.proxies.Interface(object, dbus_interface)

Bases: object

An interface into a remote object.

An Interface can be used to wrap ProxyObjects so that calls can be routed to their correct D-Bus interface.

property bus_name

The bus name to which the underlying proxy object is bound

connect_to_signal(signal_name, handler_function, dbus_interface=None, **keywords)

Arrange for a function to be called when the given signal is emitted.

The parameters and keyword arguments are the same as for dbus.proxies.ProxyObject.connect_to_signal, except that if dbus_interface is None (the default), the D-Bus interface that was passed to the Interface constructor is used.

property dbus_interface

The D-Bus interface represented

get_dbus_method(member, dbus_interface=None)

Return a proxy method representing the given D-Bus method.

This is the same as dbus.proxies.ProxyObject.get_dbus_method except that if dbus_interface is None (the default), the D-Bus interface that was passed to the Interface constructor is used.

property object_path

The D-Bus object path of the underlying object

property proxy_object

The underlying proxy object

property requested_bus_name

The bus name which was requested when the underlying object was created

class dbus.proxies.ProxyObject(conn=None, bus_name=None, object_path=None, introspect=True, follow_name_owner_changes=False, **kwargs)

Bases: object

A proxy to the remote Object.

A ProxyObject is provided by the Bus. ProxyObjects have member functions, and can be called like normal Python objects.

DeferredMethodClass

alias of dbus.proxies._DeferredMethod

INTROSPECT_STATE_DONT_INTROSPECT = 0

INTROSPECT_STATE_INTROSPECT_DONE = 2

INTROSPECT_STATE_INTROSPECT_IN_PROGRESS = 1

ProxyMethodClass

alias of dbus.proxies._ProxyMethod

property bus_name

The bus name to which this proxy is bound. (Read-only, may change.)

If the proxy was instantiated using a unique name, this property is that unique name.

If the proxy was instantiated with a well-known name and with follow_name_owner_changes set false (the default), this property is the unique name of the connection that owned that well-known name when the proxy was instantiated, which might not actually own the requested well-known name any more.

If the proxy was instantiated with a well-known name and with follow_name_owner_changes set true, this property is that well-known name.

connect_to_signal(signal_name, handler_function, dbus_interface=None, **keywords)

Arrange for the given function to be called when the given signal is received.

Parameters

signal_namestr

The name of the signal

handler_functioncallable

A function to be called when the signal is emitted by the remote object. Its positional arguments will be the arguments of the signal; optionally, it may be given keyword arguments as described below.

dbus_interfacestr

Optional interface with which to qualify the signal name. If None (the default) the handler will be called whenever a signal of the given member name is received, whatever its interface.

Keywords

utf8_stringsbool

If True, the handler function will receive any string arguments as dbus.UTF8String objects (a subclass of str guaranteed to be UTF-8). If False (default) it will receive any string arguments as dbus.String objects (a subclass of unicode).

byte_arraysbool

If True, the handler function will receive any byte-array arguments as dbus.ByteArray objects (a subclass of str). If False (default) it will receive any byte-array arguments as a dbus.Array of dbus.Byte (subclasses of: a list of ints).

sender_keywordstr

If not None (the default), the handler function will receive the unique name of the sending endpoint as a keyword argument with this name

destination_keywordstr

If not None (the default), the handler function will receive the bus name of the destination (or None if the signal is a broadcast, as is usual) as a keyword argument with this name.

interface_keywordstr

If not None (the default), the handler function will receive the signal interface as a keyword argument with this name.

member_keywordstr

If not None (the default), the handler function will receive the signal name as a keyword argument with this name.

path_keywordstr

If not None (the default), the handler function will receive the object-path of the sending object as a keyword argument with this name

message_keywordstr

If not None (the default), the handler function will receive the dbus.lowlevel.SignalMessage as a keyword argument with this name.

arg…unicode or UTF-8 str

If there are additional keyword parameters of the form argn, match only signals where the nth argument is the value given for that keyword parameter. As of this time only string arguments can be matched (in particular, object paths and signatures can’t).

get_dbus_method(member, dbus_interface=None)

Return a proxy method representing the given D-Bus method. The returned proxy method can be called in the usual way. For instance,

proxy.get_dbus_method("Foo", dbus_interface='com.example.Bar')(123)

is equivalent to:

proxy.Foo(123, dbus_interface='com.example.Bar')

or even:

getattr(proxy, "Foo")(123, dbus_interface='com.example.Bar')

However, using get_dbus_method is the only way to call D-Bus methods with certain awkward names - if the author of a service implements a method called connect_to_signal or even __getattr__, you’ll need to use get_dbus_method to call them.

For services which follow the D-Bus convention of CamelCaseMethodNames this won’t be a problem.

property object_path

The object-path of this proxy.

property requested_bus_name

The bus name which was requested when this proxy was instantiated.