[Python-ideas] [RFC] draft PEP: Dedicated infix operators for matrix multiplication and matrix power

[Steven D'Aprano]

On Sat, Mar 15, 2014 at 12:42:51PM +0000, Oscar Benjamin wrote:

> Just to add to that: I personally would almost always use brackets
> rather than rely on left- or right- associativity for something like
> this.

> A similar way that it can come up is with scalar-scalar vs
> scalar-array multiplication e.g.:
> 
> 2 * pi * x / L * A  # A is a big array
> 
> I would rewrite that as
> 
> (2 * pi * x / L) * A
> 
> rather than rely on precedence/associativity.

It seems to me that you actually are relying on precedence/ 
associativity, otherwise you would have written it in fully-bracketed 
form like this:

(((2 * pi) * x) / L) * A


It's your choice to include redundant brackets in an expression, but I 
try hard to avoid the extra visual noise.



-- 
Steven