Class property

tools/python-3.11.9-amd64/Lib/enum.py:184–231

This is a descriptor, used to define attributes that act differently when accessed through an enum member and through an enum class. Instance access is the same as property(), but access to an attribute through the enum class will instead look in the class' _member_map_ for

        return "auto(%r)" % self.value

class property(DynamicClassAttribute):
    """
    This is a descriptor, used to define attributes that act differently
    when accessed through an enum member and through an enum class.
    Instance access is the same as property(), but access to an attribute
    through the enum class will instead look in the class' _member_map_ for
    a corresponding enum member.
    """

    def __get__(self, instance, ownerclass=None):
        if instance is None:
            try:
                return ownerclass._member_map_[self.name]
            except KeyError:
                raise AttributeError(
                        '%r has no attribute %r' % (ownerclass, self.name)
                        )
        else:
            if self.fget is None:
                # look for a member by this name.
                try:
                    return ownerclass._member_map_[self.name]
                except KeyError:
                    raise AttributeError(
                            '%r has no attribute %r' % (ownerclass, self.name)
                            ) from None
            else:
                return self.fget(instance)

    def __set__(self, instance, value):
        if self.fset is None:
            raise AttributeError(
                    "<enum %r> cannot set attribute %r" % (self.clsname, self.name)
                    )
        else:
            return self.fset(instance, value)

    def __delete__(self, instance):
        if self.fdel is None:
            raise AttributeError(
                    "<enum %r> cannot delete attribute %r" % (self.clsname, self.name)
                    )
        else:
            return self.fdel(instance)

    def __set_name__(self, ownerclass, name):
        self.name = name
        self.clsname = ownerclass.__name__


class _proto_member: