pysdbus 2023.12.25

pysdbus is a Python wrapper library for DBus inter-process communication

pysdbus

pysdbus is a Python wrapper library for DBus inter-process communication. It uses Python's ctypes module to communicate directly with the sd-bus C API of the systemd library. Hence, pysdbus only depends on the presence of the libsystemd.so library and a functional Python interpreter in version 2 or 3.

pysdbus offers three APIs:

• pysdbus.llapi is the low-level API and a thin ctypes wrapper around libsystemd's C API
• pysdbus is the main API of this library and provides additional convenience around the low-level API
• pysdbus.dbus aims to provide a programming interface similar to the well-known dbus-python project

Status

This library is still in an early stage. Many features are still missing but calling and offering APIs with methods, signals and properties is already implemented.

pysdbus example

import pysdbus

bus = pysdbus.SystemBus()

obj = bus.getObject("org.freedesktop.DBus", "/org/freedesktop/DBus")

iface = obj.getInterface("org.freedesktop.DBus")

reply = iface.ListNames()

for service in reply:
        print(service)

pysdbus.dbus example

ml = MainLoop()

bus = SystemBus()

dbus_obj = bus.get_object("org.freedesktop.DBus", "/org/freedesktop/DBus")

iface = Interface(dbus_obj, "org.freedesktop.DBus")

reply = iface.ListNames()

print(reply)

def prop_changed_cb(sender, destination, path, interface, member):
	print("new signal: ", sender, destination, path, interface, member)

bus.add_signal_receiver(prop_changed_cb)

def nameowner_changed_cb(sender, destination, path, interface, member):
	print("nameowner changed: ", sender, destination, path, interface, member)

iface.connect_to_signal("NameOwnerChanged", nameowner_changed_cb)

ml.run()