Got an unwanted surprise today trying to run my codebase ("TPMS Studio") using the latest Python (3.11) instead of the 3.7 / 3.8 combos I've been using for the past few years.
Turns out the core team made a breaking change to the behaviour of enums, which breaks our file format + causes the code to crash on startup (assert failures)!
The cause:
`str(eMyEnum.Value_1)` now evaluates to "1" instead of "eMyEnum.Value_1"
(Note: eMyEnum is defined as an IntEnum)
The solution I ended up with was based on:
https://github.com/python/cpython/issues/94763#issuecomment-1313058070
[EDIT: This was the old solution. I have since learned of an even easier fix, from the official docs. See below]
In short, I now do something like:
```
import sys
import enumif sys.version_info >= (3, 11):
# Python 3.11+ hack
class IntEnum(int, enum.Enum):
# Get back old "EnumName.VariantName" str() behaviour
pass
else:
# Use old defines for older Python versions
IntEnum = enum.IntEnum
```
[Latest Update: This solution is easier to use. It comes from the official docs (i.e. example 2)]
```
from enum import Enum, IntEnum
class eMyEnum(IntEnum):
__str__ = Enum.__str__ # <--- That's the key right there
```
Reposting from my original Mastodon posts for easier searchability
