From the above example, you can know that all members of the enumeration class can be traversed through __members__. So why?
We can first take a rough look at how the source code of Enum is implemented; Enum is in the module enum.py, let’s first take a look at the fragment of the Enum class
class Enum(metaclass=EnumMeta):
"""Generic enumeration.
Derive from this class to define new enumerations.
"""
As you can see, Enum is Inherit the metaclass EnumMeta; look at the relevant fragments of EnumMeta again
class EnumMeta(type):
"""Metaclass for Enum"""
@property
def __members__(cls):
"""Returns a mapping of member name->value.
This mapping lists all enum members, including aliases. Note that this
is a read-only view of the internal mapping.
"""
return MappingProxyType(cls._member_map_)
First of all, the __members__ method returns a MappingProxyType that contains a Dict or Map, and the method __members__(cls) is accessed through @property Changed to a variable form, which can be accessed directly through __members__
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