On Sun, Oct 3, 2021 at 9:04 AM Abdulla Al Kathiri
<alkathiri.abdu...@gmail.com> wrote:
>
> Yeah empty parentheses for parameters-less function is the clear obvious way.
> Optional parenthesis for single parameter function is a wise choice. In fact,
> I read C# lambdas and they made really great design choices. I particularly
> like the statements lambda. How about doing it in Python with the set syntax
> and a little twist? The last item of the lambda set is the return value.
> Something like the following:
> (x, y) => {z = x + y, a = sqrt(z) - 10, a}
> The return value will be a. Basically if the last item is an expression, the
> return value will be the value of the expression. If the last item is an
> assignment statement, then the return value will be None. Only assignment
> statements and expressions are allowed. Other statements like for loop or
> with statement are too much anyways for lambda set. C# docs advise against
> using more than 3 statements in their statements lambda.
>
I don't like the ambiguity here - using a comma there is going to be
annoying with tuple creation. And yes, that would be an extremely
likely use-case, for example:
people.sort(key=lambda p: (p.salary, p.name, p.id))
IMO assignment statements wouldn't be needed here. For things too
complicated for assignment expressions, use def.
ChrisA
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