One-liner to conditionally swap a value

I’ve got a variable that can hold one of two values. This simple logic reverses it:

opt_in_status = some_method_that_returns_an_opt_in_status()
# switch the opt_in_status
opt_in_status = "opted_in" if opt_in_status == "unsubscribed" else "unsubscribed"

I don’t like the fact that I’ve hardcoded the magic string unsubscribed twice. I could put that into another variable

opt_in_status = some_method_that_returns_an_opt_in_status()
# switch the opt_in_status
magic_string = "unsubscribed"
opt_in_status = "opted_in" if opt_in_status == magic_string else magic_string

but is there a more concise one-liner that will do this for me?

I’m using python 3.9

>Solution :

From python 3.8 you can use the walrus operator :=

opt_in_status = "opted_in" if opt_in_status == (magic_string := "unsubscribed") else magic_string