[Python-Dev] chained assignment weirdity

MRAB python at mrabarnett.plus.com
Tue Nov 6 16:32:23 CET 2012

On 2012-11-06 15:02, Rob Cliffe wrote:
> On 06/11/2012 12:01, Nick Coghlan wrote:
>> As noted, it's really only counterintuitive if your intuition is
>> primed to expect C style right to left chained assignments.
>> Python, on the other hand, is able to preserve primarily left to right
>> evaluation in this case with only the far right hand expression
>> needing to be evaluated out of order.
> It strikes me that a really intuitive language (at least for Westerners
> who read left-to-right) would write assignments as
>      expression --> target
> and then the order of assignment in
>      expression -> target1 -> target2
> could be the natural left-to-right one.

That would make augmented assignment more difficult. For example, how
would you write the equivalent of "x -= y"?

> [Sorry, this is more appropriate to Python-ideas, but I couldn't resist
> adding my 2c.]
> Rob Cliffe

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