[Answered ]-Calculate Pyton Enum each time when evaluated with datetime?

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You can do this by programming a descriptor, like:

from datetime import datetime, timedelta
from enum import Enum


class DtDiff:
    def __init__(self, delta=timedelta()):
        self.delta = delta

    def __get__(self, obj, objtype=None):
        return datetime.now() + self.delta


class MyEnum(Enum):
    TODAY = DtDiff()
    TOMORROW = DtDiff(timedelta(days=1))

But in this case this will even nullify most functionalities of the Enum, hence it is likely not a good idea.

Probably a better way is just define a function on the Enum, like:

from datetime import datetime, timedelta
from enum import Enum


class MyEnum(Enum):
    TODAY = timedelta(0)
    TOMORROW = timedelta(days=1)

    @property
    def timestamp(self):
        return datetime.now() + self.value

You then can just get the timestamp with:

>>> MyEnum.TODAY.timestamp
datetime.datetime(2023, 6, 24, 19, 32, 41, 854253)

which looks like a minimal amount of work to get the timestamp for an enum choice.

👤willeM_ Van Onsem

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