Fix typing for _fill_device() methods

[JeanLucPons]

This PR fix typing for _fill_device() methods and also add a super method in Element to inform developers who may forget to implement it. It also allow better code introspection.

[JeanLucPons]

It seems that there is a problem in the tango backend ?

tests/integration/test_dt4acc_twin_smoke.py::test_dt4acc_twin_accelerator_instantiates_and_reads_live_values[tango-pyaml] FAILED [ 14%]
tests/integration/test_dt4acc_twin_smoke.py::test_dt4acc_twin_accelerator_instantiates_and_reads_live_values[pyaml-cs-oa] PASSED [ 28%]

>       for attribute in self._attributes:
                         ^^^^^^^^^^^^^^^^
E       TypeError: 'NoneType' object is not iterable

../../../micromamba/envs/pyaml-dt4acc-integration/lib/python3.12/site-packages/tango/pyaml/multi_attribute.py:60: TypeError

[JeanLucPons]

I can reproduce the issue in my own tests.
It was working with my previous tango backend release.

[gupichon]

I can reproduce the issue in my own tests. It was working with my previous tango backend release.

Yes, I'm about to open an issue.

[TeresiaOlsson]

It seems that there is a problem in the tango backend ?

tests/integration/test_dt4acc_twin_smoke.py::test_dt4acc_twin_accelerator_instantiates_and_reads_live_values[tango-pyaml] FAILED [ 14%]
tests/integration/test_dt4acc_twin_smoke.py::test_dt4acc_twin_accelerator_instantiates_and_reads_live_values[pyaml-cs-oa] PASSED [ 28%]

>       for attribute in self._attributes:
                         ^^^^^^^^^^^^^^^^
E       TypeError: 'NoneType' object is not iterable

../../../micromamba/envs/pyaml-dt4acc-integration/lib/python3.12/site-packages/tango/pyaml/multi_attribute.py:60: TypeError

It's the same problem that I fixed in this PR https://github.com/python-accelerator-middle-layer/tango-pyaml/pull/37/changes?

[TeresiaOlsson]

Yes, I think so. I think I had exactly that error.

[gupichon]

I'll adjust the pipeline to prevent this from happening again.

[JeanLucPons]

Nice the fix 37 from @TeresiaOlsson works flawlessly.
Thx

[TeresiaOlsson]

Nice the fix 37 from @TeresiaOlsson works flawlessly. Thx

Well... I also caused the bug to start with ;)