It's not "operator overloading" any more than two _different_ classes having a `length` property is "length overloading".
Using the term "operator overloading" to begin with is the error here.
The article is showing function overriding, not overloading, which is just standard class inheritance stuff.
If python had you write e1.__add__(e2) Or S1.__join__(s2)
Then you would have 2 distinct operators, therefore no overloading.
Re classes.
Foo.len() and bar.len() are different. You can tell that when you are using them.
It's no different to I_add() and f_add() they are both different functions.
If you automatically called one of those depending on whether the arguments were floats or ints, that would be overloading.
I suppose you could take it further and say that it's overloading if you have different int sizes.
But then we don't really class that as overloading, which I suppose demonstrates that it isn't a very precise term so there isn't much point getting particularly pedantic about it.