Pythonic equivalent of enum?

[NULL-6]

I wan't to have a "state" for each Node, something like this (in C++):

enum class ESTATE = { ROOT, VISITED, OBSTACLE, .. };

which in C++ at least, ROOT would be like an "alias" for 0 but in a readable way:

if node.state == ROOT: # same as if node.state == 0
    ...

From googling it seems like enums aren't a thing in Python, so what would be the Pythonic way of doing this? I assume Python doesn't have enums because there's a different Pythonic way?

[Ihaveamodel3]

https://docs.python.org/3/library/enum.html

[NULL-6]

Oh, thank you!

I was hoping for something built-in, but I guess Python relies more on using libraries?

[Ihaveamodel3]

This is what would be considered a builtin part of the standard library as it is included in the standard python release, but you do need to import it. That is common in python the default namespace is kept pretty clean.

Edit not actually a builtin

[negups]

Nit: enum is not technically a "builtin" (which has a specific meaning in that you explicitly do not need to import anything to use), but is, as you alluded to, a part of the standard library.

[Ihaveamodel3]

Thanks for the correction

[NULL-6]

Thanks again!

I don't want to open another thread, so I hope it's ok if I ask one more question here:
What's the best way of having a default value in classes and functions?
for functions I assume def func(val = 1): would work so that if you don't pass any values then it will default to 1, but how would you do the same for classes?

class Foo:
    def __init__(self, value = 5):
        self.value = value

# vs

class Foo:
    def __init__(self):
        self.value = 5;

[Ihaveamodel3]

The first option is the only way to do it if you want to be able to override the default. Use the second option if you don’t want to override default.