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[Python-Dev] assignment expressions: an alternative proposal

Yury Selivanov yselivanov.ml at gmail.com
Tue Apr 24 11:05:57 EDT 2018 
On Tue, Apr 24, 2018 at 10:54 AM, Anthony Flury via Python-Dev
<python-dev at python.org> wrote:
[..]
> As discussed previously by others on this exact proposals, you now have the
> issue of  confusion when using keyword arguments : *my_func(a = b)* :
> clearly that is a call to `my_func' where argument a has the value of b, but
> if you want to do an assigment expression when calling the function you now
> have to do *my_func((a=b)) -* which frankly looks messy in my opinion; you
> get the same issue when you are wanting to do assignment expressions in
> tuples.

Well, `my_func(a=(b:=foo))` or `my_func(b:=foo)` are also barely
readable to my eye.  My expectation is that users won't use any form
of assignment expressions in function calls, it's painful with both
proposals.

Yury
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