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From: Michael Selik <michael.selik@gmail.com>
Newsgroups: comp.lang.python
Subject: Re: Method Chaining
Date: Fri, 17 Jun 2016 23:10:10 +0000
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Xref: csiph.com comp.lang.python:110065

On Fri, Jun 17, 2016, 6:44 PM Michael Selik <michael.selik@gmail.com> wrote=
:

>
>
> On Fri, Jun 17, 2016, 6:42 PM Lawrence D=E2=80=99Oliveiro <lawrencedo99@g=
mail.com>
> wrote:
>
>> On Saturday, June 18, 2016 at 1:35:06 AM UTC+12, Michael Selik wrote:
>>
>> > The chained version looks like each method is returning a modified
>> > copy.
>>
>> As opposed to a modified original?
>>
>
> Correct. Read the rationale for list.sort returning None. It's in the
> Python design FAQ.
>

Sorry, I should have included the link.

https://docs.python.org/2/faq/design.html#why-doesn-t-list-sort-return-the-=
sorted-list

Even if we're talking about a non-mutation side-effect, I think the same
rationale applies.