[Python-ideas] Left arrow and right arrow operators

[Calvin Spealman]

I don't like the idea of arrows in both directions when you can just swap
the operands instead

On Sun, Mar 3, 2019 at 9:52 AM francismb <francismb at email.de> wrote:

> Hi,
> the idea here is just to add the __larrow__ and __rarrow__ operators for
> <- and ->.
>
>
> E.g. of use on dicts :
> >>> d1 = {'a':1, 'b':1 }
> >>> d2 = {'a':2 }
> >>> d3 = d1 -> d2
> >>> d3
> {'a':1, 'b':1 }
>
> >>> d1 = {'a':1, 'b':1 }
> >>> d2 = {'a':2 }
> >>> d3 = d1 <- d2
> >>> d3
> {'a':2, 'b':1 }
>
> Or on bools as Modus Ponens [1]
>
> Or your idea/imagination here :-)
>
>
>
> Regards,
> --francis
>
> [1] https://en.wikipedia.org/wiki/Modus_ponens
>
>
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