items = ["foo", "bar", "quux"] items[randrange(3)] .= upper()

Is this equivalent to:

items[randrange(3)] = items[randrange(3)].upper()

? That would call randrange twice, potentially grabbing one element and dropping it into another slot. If it isn't equivalent to that, how is it defined?

It would not call randrange twice. Consider existing Python behavior: def foo(): print("foo") return 0 l = [7] l[foo()] += 1 # output: "foo", but only once print(l) # l == [8] Sent from my iPhone

On Sep 27, 2018, at 4:13 PM, Chris Angelico <rosuav@gmail.com> wrote:

That would call randrange twice, potentially grabbing one element and dropping it into another slot. If it isn't equivalent to that, how is it defined?