> but IMO `+=` is the wrong way to spell it. Again, operator overloading. __iadd__ just calls append. Many a library might do something much better. But as it

> but IMO `+=` is the wrong way to spell it. Again, operator overloading. __iadd__ just calls append. Many a library might do something much better. But as it looks like the in-place version of +, even for lists it seems fine (although I've been missing a concat-operator in python for years - seems we're stuck with +).