python - 使用枚举项作为列表索引

Question

我有这段代码:

class FileType(Enum):
    BASIC = 0
    BASIC_CORRUPTED = 1
    BASIC_SHITTY_END = 2
    MIMIKATZ = 3
    HASHCAT = 4

    def __eq__(self, v):
        """
        Override == in order to make `FileType.BASIC == 0` equals to True, etc.
        """
        return self.value == v if isinstance(v, int) else self.value == v.value

我想知道如果我想执行此操作我应该添加什么:random_array[FileType.MIMIKATZ]。目前，Python3 告诉我 TypeError: list indices must be integers or slice, not FileType

Answer 1

你的类应该继承自 IntEnum相反，这支持类似整数的行为。从文档中，

Members of an IntEnum can be compared to integers; by extension, integer enumerations of different types can also be compared to each other:

from enum import IntEnum

class FileType(IntEnum):
    BASIC = 0
    BASIC_CORRUPTED = 1
    BASIC_SHITTY_END = 2
    MIMIKATZ = 3
    HASHCAT = 4

您现在可以使用枚举常量来索引您的列表，

data = [1, 2, 3, 4]
data[FileType.MIMIKATZ]
# 4