docs/library/enum.rst: Add Enum class. #16842
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IhorNehrutsa
commented
Mar 11, 2025
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| There is the trouble with the isinstance()/type(). | ||
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| >>> isinstance(State.Run, State) | ||
| False | ||
| >>> State(State.Ready) == State.Ready | ||
| False | ||
| >>> int(str(State(State.Ready))) == State.Ready | ||
| True | ||
| >>> type(State(State.Ready)) | ||
| <class 'State'> | ||
| >>> type(state(State.Ready)) | ||
| <class 'int'> | ||
| >>> state(State.Ready) == State.Ready | ||
| True |
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@dpgeorge
There is solution for this trouble.
We need to remove enums from internal State.__dict__
>>> class State(Enum):
Stop = 10
Run = 20
Ready = 30
>>> dir(State)
['__dir__', '__call__', '__class__', '__delitem__', '__getattr__', '__getitem__', '__init__', '__len__', '__module__', '__name__', '__qualname__', '__repr__', '__setitem__', '__str__', 'append', 'clear', 'copy', 'get', 'items', 'keys', 'pop', 'popitem', 'setdefault', 'update', 'values', '__bases__', '__delattr__', '__dict__', '__setattr__', 'fromkeys', '_get_enums_from_class', '_update', 'is_value', 'key_from_value', 'Stop', 'Run', 'Ready']
>>> State.__dict__
{'__qualname__': 'State', 'Ready': 30, '__module__': '__main__', 'Stop': 10, 'Run': 20}
>>>
I tried, but I couldn't do it.
Signed-off-by: Ihor Nehrutsa <Ihor.Nehrutsa@gmail.com>
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Summary
There are several requests to develop the
Enumclass for MicroPython:Implementation in:
micropython-lib/python-stdlib/enum/enum.py: Add Enum class. #980
Testing
Tested during porting MKS-Servo CAN Interface Library to the MicroPython.
Used port/esp32: Add CAN(TWAI) driver. #12331.
Trade-offs and Alternatives
There is the trouble with the isinstance()/type().
Quastion: Should enum.py and enum_test.py be placed in the micropython or micropython-lib repository?