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dd� Zdd� Zdd� Zdd� Zdd� Zd d � Zd d � Zd S )!r a4 Base class for DBus observers.
This class is recommended to use only to watch the availability
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Usage:
.. code-block:: python
# Create the observer and connect to its signals.
observer = DBusObserver(SystemBus, "org.freedesktop.NetworkManager")
def callback1(observer):
print("Service is available!")
def callback2(observer):
print("Service is unavailable!")
observer.service_available.connect(callback1)
observer.service_unavailable.connect(callback2)
# Connect to the service once it is available.
observer.connect_once_available()
# Disconnect the observer.
observer.disconnect()
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