这样,就会为由此创建的每个枚举MyAnotherEnum.description[3] == 'ccc'自动生成属性。descriptionCustomEnumBase我试图延长Enum课程时间,但我尝试过的所有方法都失败了。我在想这样的事情:class CustomEnumBase: @property def names(cls): return { id:member.name for id, member in cls._value2member_map_.ite...
class SomeEnum2(Enum, metaclass=SomeEnumMeta): A1 = partial(lambda x: x) def __call__(self, *args, **kwargs): return self.value(*args, **kwargs) print(SomeEnum1.__getattr__("A1")) print(SomeEnum2.__getattr__("a1")("123")) print(SomeEnum2.__getattr__("B")("123")) ...
from enum importEnum classState(Enum):AIR=0 LAND=1 SEA=2 myState =State.AIR # Prints 0 print(myState.value)# Prints AIR print(myState.name)在上述代码中，可以看到通过构造一个类并使其成为枚举的子类，便可以轻松构造枚举。在这里只需在下面的行中定义每个状态。就我而言，我有AIR、LAND、SEA。P...
python from enum import Enum class A(Enum): a=1 b=2 c=3 """ 继承Enum基类后一个枚举类中key不能相同 如果希望value也不同可以导入unique """ @unique class A(Enum): a=1 b=2 c=3 闭包 防止局部变量污染全局变量 nonlocal 获取上层作用域的某个变量值 难以追踪 生成器(yield) 生成器是迭代器...
What's the purpose of enums? What value do they create for the language? When should I use them and when should I avoid them? 枚举类型通过PEP 435进入Python。给出的理由是:The properties of an enumeration are useful for defining an immutable, related set of constant values that may or may...
# Python Create Enum fromenumimportEnum classColor(Enum): RED= 1 GREEN= 2 BLUE= 3 #Toaccess the values of anEnumClass print(Color.GREEN.name) print(Color.GREEN.value) if (Color.GREEN.value==Color.BLUE.value): print(Color.GREEN, 'equals',Color.BLUE) ...
from enum import Enum, unique @unique class VehicleType(Enum): CAR = 1 TRUCK = 2 MOTORCYCLE = 3 BUS = 4 # Attempting to create an enumeration with a duplicate value will raise a ValueError try: @unique class DuplicateVehicleType(Enum): ...
关于python中Enum的个人总结 初识 可以通过enum模块导入 语法 初始化: 可以通过enum_ = Enum('class_name', names,start = 1)来创建,其中names可以是字符串,可以是列表/元组。内部定义为: def_create_(cls, class_name, names, *, module=None, qualname=None,type=None, start=1):"""Convenience method ...
from enum import Enum BLOCK_WIDTH = 30 BLOCK_HEIGHT = 16 SIZE = 20 # 块大小 MINE_COUNT = 99 # 地雷数 class BlockStatus(Enum): normal = 1 # 未点击 opened = 2 # 已点击 mine = 3 # 地雷 flag = 4 # 标记为地雷 ask = 5 # 标记为问号 ...
classEnumMeta(type):def__new__(metacls,cls,bases,classdict):...# create ournewEnumtype enum_class=super().__new__(metacls,cls,bases,classdict)enum_class._member_names_=[]# namesindefinition order enum_class._member_map_=OrderedDict()# name->value mapformember_nameinclassdict._member_na...