Python Enums
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Enums are readable names that are bound to a constant value.
To use enums, import Enum
from the enum
standard library module:
from enum import Enum
Then you can initialize a new enum in this way:
class State(Enum):
INACTIVE = 0
ACTIVE = 1
Once you do so, you can reference State.INACTIVE
and State.ACTIVE
, and they serve as constants.
Now if you try to print State.ACTIVE
for example:
print(State.ACTIVE)
it will not return 1
, but State.ACTIVE
.
The same value can be reached by the number assigned in the enum: print(State(1))
will return State.ACTIVE
. Same for using the square brackets notation State['ACTIVE']
.
You can however get the value using State.ACTIVE.value
.
You can list all the possible values of an enum:
list(State) # [<State.INACTIVE: 0>, <State.ACTIVE: 1>]
You can count them:
len(State) # 2
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