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September 20, 2023 15:04
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Experimenting with creating enums with auto values dynamically without having to assign `auto()`. This is a terrible idea and results in code that at times could be ambiguous. A fun excersize.
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| import inspect | |
| from enum import Enum, auto, EnumType | |
| class EnumCaptureDict(dict): | |
| def __getitem__(self, item): | |
| if item in self or (item.startswith("__") and item.endswith("__")): | |
| return super().__getitem__(item) | |
| frame = inspect.currentframe().f_back | |
| if item in frame.f_back.f_locals: | |
| return frame.f_back.f_locals[item] | |
| if item in frame.f_globals: | |
| return frame.f_globals[item] | |
| if hasattr(frame.f_globals["__builtins__"], item): | |
| return getattr(frame.f_globals["__builtins__"], item) | |
| self[item] = auto() | |
| return self[item] | |
| class EnumMCS(EnumType): | |
| @classmethod | |
| def __prepare__(mcs, cls, bases): | |
| d = super().__prepare__(cls, bases) | |
| d.__class__ = type("EnumCaptureDict", (EnumCaptureDict, d.__class__), {}) | |
| return d | |
| def test(): | |
| Bob = "BOBOB" | |
| def wrapper(): | |
| nonlocal Bob | |
| class Test(str, Enum, metaclass=EnumMCS): | |
| @staticmethod | |
| def _generate_next_value_(name, start, count, last_values): | |
| return name | |
| Bob = Bob | |
| Alice | |
| Charlie | |
| return Test | |
| return wrapper() | |
| Test = test() | |
| assert repr(Test.Bob) == "<Test.Bob: 'BOBOB'>" | |
| assert repr(Test.Bob.value) == "'BOBOB'" | |
| assert repr(Test.Alice) == "<Test.Alice: 'Alice'>" | |
| assert repr(Test.Alice.value) == "'Alice'" | |
| print("It works!") |
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