When creating a new IR event listener
irlistener = pifacecad.IREventListener( prog="pifacecad-radio-example", lircrc="/usr/share/doc/python3-pifacecad/examples/radiolircrc")
it would fail with a message
File "/usr/lib/python3/dist-packages/pifacecad/ir.py", line 39, in __init__ self.event_queue = multiprocessing.queues.SimpleQueue() TypeError: __init__() missing 1 required keyword-only argument: 'ctx'
Use multiprocessing.SimpleQueue instead of multiprocessing.queues.SimpleQueue in IREventListener. The latter seems to be a lower-level interface, which expects a context to be passed to it (which multiprocessing.SimpleQueue does pass). This was preventing a listener from being initialized in the radio example (note that ir was not configured anyway).
When creating a new IR event listener
irlistener = pifacecad.IREventListener( prog="pifacecad-radio-example", lircrc="/usr/share/doc/python3-pifacecad/examples/radiolircrc")it would fail with a message
File "/usr/lib/python3/dist-packages/pifacecad/ir.py", line 39, in __init__ self.event_queue = multiprocessing.queues.SimpleQueue() TypeError: __init__() missing 1 required keyword-only argument: 'ctx'Use multiprocessing.SimpleQueue instead of multiprocessing.queues.SimpleQueue in IREventListener. The latter seems to be a lower-level interface, which expects a context to be passed to it (which multiprocessing.SimpleQueue does pass). This was preventing a listener from being initialized in the radio example (note that ir was not configured anyway).
Understood the issue after seeing http://bugs.python.org/issue21367
As per Python 3 docs it is https://docs.python.org/3/library/multiprocessing.html#multiprocessing.SimpleQueue