

Yeah, if you initialize them to None then for the entire rest of the class you’re going to have to account for the possibility that they’re None. If it’s unavoidable that they might be None, you should type it as such.
If you type them as like str | None then later when you do like return foo[0] it will warn you that you can’t do that with None.












Technically correct , the best kind of correct.
foo.lower()would have been a better example.