Python Enum _value2member_map_ Accessor?

Question

I created an enum base class to standardize reverse lookups on simple enums.

from enum import Enum

class ReversibleEnum(Enum):
    @classmethod
    def fromName(cls, str):
        return getattr(cls, str.lower())

    @classmethod
    def fromValue(cls, value):
        return cls._value2member_map_[value]

Is there is an official way to get one's hands on the _value2member_map_ dict? (or is there a standard way to do this that I missed?)

Thanks!

Answer 1

Getting members is supported both by name and by value:

from enum import Enum

class Color(Enum):
    RED = 1
    GREEN = 2
    BLUE = 3

>>> Color['RED']    # note square brackets
<Color.RED: 1>

>>> Color(1)
<Color.RED: 1>      # note round parenthesis