It’s “correct”, PEP8 just flags lines over 79 characters long. But if you’re concerned about that, you could write it like this: Or this: Or, really, any other style that would break the single line into multiple shorter lines.
PEP-8 recommends you indent lines to the opening parentheses if you put anything on the first line, so it should either be indenting to the opening bracket: or not putting any arguments on the starting line, then indenting to a uniform level: I suggest taking a read through PEP-8 – you can skim through a … Read more
Just add another line between your function definitions : 1 line : 2 lines:
There’s no performance difference, as they compile to the same bytecode: Stylistically, I try to avoid not x is y, a human reader might misunderstand it as (not x) is y. If I write x is not y then there is no ambiguity.