Dynamic api #29
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Dynamic api #29
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@nierob might find this amusing |
Just the very basic infrastructure to make debugging easier. Since most people have only one receiver, we need to be able to capture logs. One option for users is to simply uncomment one line to enable logging of all communication through serial or telnet.
nierob
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Apr 29, 2020
nad_receiver/__init__.py
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| if attr.startswith("_"): | ||
| return |
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Why that? Shouldn't that raise AttributeError? (https://docs.python.org/3/reference/datamodel.html#object.__getattr__)
nad_receiver/__init__.py
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| return _CallHandler(self._transport, self._domain, attr) | ||
| raise TypeError(f"{attr}") | ||
| if self._op: | ||
| raise TypeError(f"{self} has no attribute {attr}") |
This implements the complete RS232 API of the receiver in a mock class. With this the receiver can be tested locally without having any serial port. Add a test that checks that communication with that particular amplifier doesn't break again. Similar tests are needed for other models, but since this is the only amp I have, I'm not easily able to write them. The sources are for now left out because the current implementation assumes sources to be integers, while the V2 protocol is purely string based.
We have a complete description of the protocol in nad_commands. Let's use it. This dynamically generates objects from the command dictionary, so that new functions do not need any code any more. Instead one can simply call: receiver.main.volume.increase() This works by inspecting nad_commands when asking for attributes of the receiver class or it's dynamically created subclasses. The old API is around unchanged to stay compatible.
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This is a bit of an exercise to play with Python attributes. See description in the commit message of 4c73c46
Basically new API can be added by just editing CMDS in nad_commands.py.
receiver.main.volume.increase()works then by inspecting the commands dictionary.