[Python-ideas] Add an option for delimiters in bytes.hex()
steve at pearwood.info
Tue May 2 20:43:33 EDT 2017
On Tue, May 02, 2017 at 11:39:48PM +0100, Erik wrote:
> On 02/05/17 12:31, Steven D'Aprano wrote:
> >Rather than duplicate the API and logic everywhere, I suggest we add a
> >new string method. My suggestion is str.chunk(size, delimiter=' ') and
> >str.rchunk() with the same arguments:
For the record, I now think the second argument should be called "sep",
for separator, and I'm okay with Greg's suggestion we call the method
> >=> returns "1234 ABCD EF"
> Why do you want to limit it to strings?
I'm not stopping anyone from proposing a generalisation of this that
works with other sequence types. As somebody did :-)
I've also been thinking about generalisations such as grouping lines
into paragraphs, words into lines, etc. In text processing, chunking can
refer to more than just characters.
But here we have a specific, concrete use-case that involves strings.
Anything else is YAGNI until a need is demonstrated :-)
> Isn't something like this
> potentially useful for all sequences (where the result is a tuple of
> objects that are the same as the source sequence - be that strings or
> lists or lazy ranges or whatever?). Why aren't the chunks returned via
> an iterator?
String methods should return strings.
That's not to argue against a generic iterator solution, but the barrier
to use of an iterator solution is higher than just calling a method. You
have to learn about importing, you need to know there is an itertools
module (or a third party module to install first!), you have to know how
to convert the iterator back to a string...
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