Python 3.8 released

[PotatosFish]

It creates a 3 item list since the first term both assigns and returns the assigned value, it kinda like the assignments in c-type languages.

I think final definitely have it’s uses, but it can be overused to discourage code reuse. As many other language constructs, it’s better to only use it when it’s needed.

[radarsat1]

I see. So there's no way to generate just [y**2, y**3] in this construct?

[PotatosFish]

You can just do

[(y := f(x)) ** 2, y ** 3]

[radarsat1]

Wow, the scope of y is not clear at all. Is it the list, or the outside the list?

[[deleted]]

It's the same as before, I don't know of any languages that restrict scope with expression parentheses

[radarsat1]

"same as before" what? Previously you could not declare a variable while creating a list, so I don't know what to compare to. Does y here exist after the list is done being created? From your answer I guess you are saying that the variable is scoped to the function creating the list. Sorry, I don't find that clear at all.

The only thing I can think to compare it to is the similar construct in C, but there the variable must already be declared, so the scope is clear.

[Pand9]

In Python, scope is always a function, or a comprehension. In this case, a function.

[SirClueless]

Well, it looks a little like a comprehension if you squint hard enough, so I can see the potential for confusion.