[Python-ideas] PEP: Dict addition and subtraction

[Jimmy Girardet]

> but requires either some obscure syntax or a statement instead of a simple
> expression.
>
> The proposal is to enable the obvious syntax for something that should be
> obvious.
>
> Stefan

The discussions on this list show that the behavior of `+` operator with
dict will never be obvious (first wins or second wins or add results or
raise Exception). So the user will always have to look at the doc or
test it to know the intended behavior.

That said, [1,2] + [3] equals  [1,2,3]  but not[1,2, [3]] and that was
not obvious to me, and I survived.