> On 17 Oct 2019, at 22:44, Steven D'Aprano <st...@pearwood.info> wrote:
>
> On Thu, Oct 17, 2019 at 01:42:54PM +0200, Anders Hovmöller wrote:
>
>> The multiply a list/string thing is a big mistake imo. You almost
>> never use it so the cost of not having it is almost nothing while the
>> cost of having type errors propagate beyond the point where they
>> happened is big.
>
> I use string repetition and concatenation frequently. For example, for
> indenting a string I much prefer this:
>
> string = " "*n + string
>
> over something like
>
> string = ''.join([''.join(' ' for __ in range(n)), string])
Yes that's terrible. But `" ".fill(n) + string"` would be just as good but
without being a source of bugs that pollutes downstream execution.
>
> List repetition, not so often, but I do use list concatenation and even
> more so tuple concatenation.
Which are fine because the types at least have to match. It would have been
better with a dedicated concat operator I think but just a little bit better.
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