Python の列挙型

WEEKDAY = {
    'MON': 1,
    'TUS': 2,
    'WEN': 3,
    'THU': 4,
    'FRI': 5
}
class Color:
    RED   = 0
    GREEN = 1
    BLUE  = 2

WEEKDAY['MON'] = WEEKDAY['FRI']print(WEEKDAY)
{'FRI': 5, 'TUS':

{'FRI': 5, 'TUS': 2, 'MON': 5, 'WEN': 3, 'THU': 4}

c = Color()
print(c.RED)
Color.RED = 2
print(c.RED)

0
2

COLOR = ('R', 'G', 'B')
print(COLOR[0], COLOR[1], COLOR[2])

R G B

from enum import Enum, IntEnum, uniquetry:    @unique
    class WEEKDAY(Enum):
        MON = 1
        TUS = 2
        WEN = 3
        THU = 4
        FRI = 1except ValueError as e:
    print(e)

duplicate values found in <enum &#39;WEEKDAY&#39;>: FRI -> MON

try:    class Color(IntEnum):
        RED   = 0
        GREEN = 1
        BLUE  = 'b'except ValueError as e:
    print(e)

invalid literal for int() with base 10: 'b'

class Color(Enum):
    R = 0
    G = 1
    B = 2

try:
    Color.R = 2except AttributeError as e:
    print(e)

Cannot reassign members.

red = Color(0)
green = Color(1)
blue = Color(2)
print(red, green, blue)

Color.R Color.G Color.B

print(red is Color.R)
print(red == Color.R)
print(red is blue)
print(green != Color.B)
print(red == 0) # 不等于任何非本枚举类的值

True
True
False
True
False

print(red.B)
print(red.B.G.R)

Color.B
Color.R