Python enum từ chuỗi

Phép liệt kê trong Python được triển khai bằng cách sử dụng mô-đun có tên “enum“. Bảng liệt kê được tạo bằng cách sử dụng các lớp. Enums có tên và giá trị liên kết với chúng

Thuộc tính của enum

• Enums có thể được hiển thị dưới dạng chuỗi hoặc repr
• Enums có thể được kiểm tra các loại của chúng bằng cách sử dụng type()
• Từ khóa “tên” được sử dụng để hiển thị tên của thành viên enum

ví dụ 1. lớp Enum trong Python

Mã Python để chứng minh liệt kê

Python3

from enumimport Enum

class

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

Enum is hashed

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

Enum is hashed

Enum is hashed

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

Enum is hashed

Enum is hashed

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

Enum is hashed

Enum is hashed

Dog and cat are different animals
Lions and cat are different

Dog and cat are different animals
Lions and cat are different

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

Enum is hashed

Dog and cat are different animals
Lions and cat are different

Dog and cat are different animals
Lions and cat are different

Dog and cat are different animals
Lions and cat are different

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

Enum is hashed

Dog and cat are different animals
Lions and cat are different

đầu ra.  

Season.SPRING
SPRING
1


[, , , ]

ví dụ 2. Chế độ truy cập

Thành viên Enum có thể được truy cập theo hai cách

• Theo giá trị. - Trong phương thức này, giá trị của thành viên enum được truyền vào
• Bằng tên. - Trong phương thức này, tên của thành viên enum được truyền

Một giá trị hoặc tên riêng biệt cũng có thể được truy cập bằng cách sử dụng từ khóa “tên” hoặc “giá trị”

Python3

from enumimport Enum

class

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

import3

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

Enum is hashed

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

Enum0

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

Enum is hashed

đầu ra.  

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

ví dụ 3. Bảng liệt kê có thể lặp lại. Chúng có thể được lặp lại bằng các vòng lặp

Trong ví dụ này, chúng ta sẽ sử dụng vòng lặp for để in tất cả các thành viên của lớp Enum.

Python3

from enumimport Enum

class

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

The enum member associated with value 2 is :  SUMMER
The enum member associated with name AUTUMN is :  3

đầu ra.  

1 - Season.SPRING
2 - Season.SUMMER
3 - Season.AUTUMN
4 - Season.WINTER

Ví dụ 4. Bảng liệt kê hỗ trợ băm

Trong ví dụ này, chúng tôi sẽ chỉ ra cách người dùng có thể băm lớp Enum có thể được sử dụng trong từ điển hoặc bộ

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