On Thu, 28 Feb 2019 at 07:18, Serhiy Storchaka <storchaka@gmail.com> wrote:

[...]

I do not understand why we discuss a new syntax for dict merging if we
already have a syntax for dict merging: {**d1, **d2} (which works with
*all* mappings). Is not this contradicts the Zen?

FWIW there are already three ways for lists/sequences:

[*x, *y]

x + y

x.extend(y) # in-place version

We already have first and third for dicts/mappings, I don't see a big problem in adding a + for dicts,

also this is not really a new syntax, just implementing couple dunders for a builtin class.

So I actually like this idea.

Ivan