Python enum implementation

Question

I have declared the enum as follows in python.I don't know how to use them.When I create an instance of this class it gives error as two arguments are required one given.

class CBarReference(Enum):    
ThisBar = 0,
NextBar = 1,
Undefined=2
a=CBarReference()

I know what error is but I don't know what to give as the second argument other than self.

Have you read [the docs](https://docs.python.org/3/library/enum.html)? Or considered showing the actual code you're running and full error traceback? — jonrsharpe, Jun 27 '14 at 06:50
Just tell how to make this type of class and the second argument. — user3755882, Jun 27 '14 at 06:51

score 1 · Answer 1 · answered Jun 27 '14 at 06:54

1

You should never have to create an instance of an enum; they're all accessed directly from the class, and you can just assign them to variables as you like:

a = CBarReference.ThisBar
b = CBarReference.NextBar
c = CBarReference.Undefined
d = CBarReference.ThisBar
assert(a == d)
assert(b != a)
assert(b != c)

answered Jun 27 '14 at 06:54

dustyrockpyle

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I need to create an instance. – user3755882 Jun 27 '14 at 07:00
What do you need an instance for? The reason you're getting the error is because the constructor to Enum expects *args strings so that you can create an enum without subclassing. – dustyrockpyle Jun 27 '14 at 07:08

Python enum implementation

1 Answers1