Guide: D-Bus usage in Python

Use the dbus python bindings to get the computer’s battery level using a python script. You can start from the documentation here. You need to read the sections Connecting to the Bus, Proxy objects, and Interfaces and methods.

There’s also a skeleton you can use in labs/lab-12/guides/dbus-usage-python/support/dbus/get_battery_level.py.

In summary, your script will start by connecting to the System Bus. Then you’ll use the get_object method to obtain a proxy object. On this proxy object, you can actually do the method call as explained here:

To call a method, call the method of the same name on the proxy object, passing in the interface name via the dbus_interface keyword argument

So, if you want to call the method this.is.an.interface.method with the arguments A and B you can do it like this:

result = proxy.method(A, B, dbus_interface = "this.is.an.interface")