Python: how to use enum in python

Description:

• Enums have been added to Python 3.4 as described in PEP 435. It has also been backported to 3.3, 3.2, 3.1, 2.7, 2.6, 2.5, and 2.4 on pypi.
• For more advanced Enum techniques try the aenum library (2.7, 3.3+, same author as enum34. Code is not perfectly compatible between py2 and py3, e.g. you'll need __order__ in python 2).  
• To use enum34, do $ pip install enum34
• To use aenum, do $ pip install aenum
  
  

Program:

  # Python enum usage
# Check : http://velrajcoding.blogspot.in
#

# Below is supported from python 3.4 onwards.
from enum import Enum

class Animal(Enum):
    DOG = 1
    CAT = 2
    LION = 3


class EnumAssign():
    def __init__(self):
        self.Animal_enum = Animal

    def display_ani(self, value):
        print("The EnumAssign Animal.DOG  : ")
        print(self.Animal_enum.DOG)

        print("The EnumAssign Animal.DOG value : %d" % self.Animal_enum.DOG.value)

        print("The EnumAssign Animal.DOG  name : %s" % self.Animal_enum.DOG.name)
        if self.Animal_enum.DOG.value == value:
            print("The requested value is DOG")
        elif (self.Animal_enum.CAT.value == value):
            print("The requested value is CAT")
        elif (self.Animal_enum.LION.value == value):
            print("The requested value is LION")
def main():
    print()
    print("****************** Starting Main fun ******************************")
    print()
    obj = EnumAssign();
    obj.display_ani(Animal.CAT.value)

#print("The value of enum is    : %d " % Animal.DOG)
print("The display Outside function Direct access Animal.DOG : ")
print(Animal.DOG)

print("The display Outside function Direct access Animal.DOG value : %d" % Animal.DOG.value)

print("The display Outside function Direct access Animal.DOG  name : %s" % Animal.DOG.name)


if __name__ == "__main__":
    main()

   

Output

h]$ python3 py_enum.py
The display Outside function Direct access Animal.DOG :
Animal.DOG
The display Outside function Direct access Animal.DOG value : 1
The display Outside function Direct access Animal.DOG  name : DOG

****************** Starting Main fun ******************************

The EnumAssign Animal.DOG  :
Animal.DOG
The EnumAssign Animal.DOG value : 1
The EnumAssign Animal.DOG  name : DOG
The requested value is CAT

Reference:
     https://stackoverflow.com/questions/36932/how-can-i-represent-an-enum-in-python