Re: generator/coroutine terminology

From	Marko Rauhamaa <marko@pacujo.net>
Newsgroups	comp.lang.python
Subject	Re: generator/coroutine terminology
Date	2015-03-16 09:12 +0200
Organization	A noiseless patient Spider
Message-ID	<87egopmn4z.fsf@elektro.pacujo.net> (permalink)
References	(3 earlier) <mailman.376.1426370550.21433.python-list@python.org> <874mpnp6nv.fsf@elektro.pacujo.net> <mailman.379.1426371862.21433.python-list@python.org> <87y4mznmj8.fsf@elektro.pacujo.net> <55062bda$0$12998$c3e8da3$5496439d@news.astraweb.com>

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Steven D'Aprano <steve+comp.lang.python@pearwood.info>:

> Marko Rauhamaa wrote:
>> What features do generator iterators provide on top of generic
>> iterators?
>
> The biggest difference is syntactic. Here's an iterator which returns a
> never-ending sequence of squared numbers 1, 4, 9, 16, ...
>
> class Squares:
>     def __init__(self):
>         self.i = 0
>     def __next__(self):
>         self.i += 1
>         return self.i**2
>     def __iter__(self):
>         return self
>
>
> Here's the same thing written as a generator:
>
> def squares():
>     i = 1
>     while True:
>         yield i**2
>         i += 1

I was actually referring to the offered API. It still seems to me like
all iterators could offer close(), send() and throw(). Why? To make all
iterators drop-in replacements of each other.

Then, you could also stop wondering what to call the thingy returned by
a generator. Why, it would be an iterator. You wouldn't then have any
other use for a generator than the function that returns an iterator.

You could then decide if you want to reserve the name "generator" for
functions that contain a yield statement (syntactic notion) or call any
function returning an iterator a "generator" (semantic notion).

Marko

Thread

generator/coroutine terminology Rustom Mody <rustompmody@gmail.com> - 2015-03-12 06:35 -0700
  Re: generator/coroutine terminology Chris Angelico <rosuav@gmail.com> - 2015-03-13 00:55 +1100
  Re: generator/coroutine terminology breamoreboy@gmail.com - 2015-03-12 06:57 -0700
  Re: generator/coroutine terminology Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-13 03:27 +1100
    Re: generator/coroutine terminology Rustom Mody <rustompmody@gmail.com> - 2015-03-12 09:52 -0700
      Re: generator/coroutine terminology Marko Rauhamaa <marko@pacujo.net> - 2015-03-12 19:55 +0200
        Re: generator/coroutine terminology Rustom Mody <rustompmody@gmail.com> - 2015-03-12 19:23 -0700
          Re: generator/coroutine terminology Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-13 14:30 +1100
            Re: generator/coroutine terminology Rustom Mody <rustompmody@gmail.com> - 2015-03-12 22:28 -0700
              Re: generator/coroutine terminology Chris Angelico <rosuav@gmail.com> - 2015-03-13 19:23 +1100
                Re: generator/coroutine terminology Rustom Mody <rustompmody@gmail.com> - 2015-03-13 02:12 -0700
                Re: generator/coroutine terminology Marko Rauhamaa <marko@pacujo.net> - 2015-03-13 11:36 +0200
                Re: generator/coroutine terminology Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-14 17:04 +1100
                Re: generator/coroutine terminology Marko Rauhamaa <marko@pacujo.net> - 2015-03-14 09:54 +0200
                Re: generator/coroutine terminology Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-03-14 08:04 +0000
                Re: generator/coroutine terminology Marko Rauhamaa <marko@pacujo.net> - 2015-03-14 10:30 +0200
                Re: generator/coroutine terminology Ian Kelly <ian.g.kelly@gmail.com> - 2015-03-14 14:14 -0600
                Re: generator/coroutine terminology Rustom Mody <rustompmody@gmail.com> - 2015-03-14 21:15 -0700
                Re: generator/coroutine terminology Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-03-14 20:31 +0000
                Re: generator/coroutine terminology Rustom Mody <rustompmody@gmail.com> - 2015-03-14 08:29 -0700
                Re: generator/coroutine terminology Chris Angelico <rosuav@gmail.com> - 2015-03-15 02:56 +1100
                Re: generator/coroutine terminology Rustom Mody <rustompmody@gmail.com> - 2015-03-14 08:59 -0700
                Re: generator/coroutine terminology Chris Angelico <rosuav@gmail.com> - 2015-03-15 03:14 +1100
                Re: generator/coroutine terminology Rustom Mody <rustompmody@gmail.com> - 2015-03-14 09:33 -0700
                Re: generator/coroutine terminology Chris Angelico <rosuav@gmail.com> - 2015-03-15 03:51 +1100
                Re: generator/coroutine terminology Rustom Mody <rustompmody@gmail.com> - 2015-03-14 10:17 -0700
                Re: generator/coroutine terminology Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-03-14 16:56 +0000
                Re: generator/coroutine terminology Dave Angel <davea@davea.name> - 2015-03-14 13:07 -0400
                Re: generator/coroutine terminology albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-03-31 12:57 +0000
                Re: generator/coroutine terminology Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-15 19:37 +1100
                Re: generator/coroutine terminology CHIN Dihedral <dihedral88888@gmail.com> - 2015-04-18 11:07 -0700
                Re: generator/coroutine terminology Chris Angelico <rosuav@gmail.com> - 2015-03-13 22:32 +1100
      Re: generator/coroutine terminology Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2015-03-14 22:02 +0000
        Re: generator/coroutine terminology Marko Rauhamaa <marko@pacujo.net> - 2015-03-15 00:15 +0200
          Re: generator/coroutine terminology Chris Angelico <rosuav@gmail.com> - 2015-03-15 09:24 +1100
            Re: generator/coroutine terminology Marko Rauhamaa <marko@pacujo.net> - 2015-03-15 02:15 +0200
              Re: generator/coroutine terminology Chris Angelico <rosuav@gmail.com> - 2015-03-15 11:22 +1100
                Re: generator/coroutine terminology Marko Rauhamaa <marko@pacujo.net> - 2015-03-15 02:48 +0200
                Re: generator/coroutine terminology Chris Angelico <rosuav@gmail.com> - 2015-03-15 13:02 +1100
              Re: generator/coroutine terminology Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-16 12:03 +1100
                Re: generator/coroutine terminology Marko Rauhamaa <marko@pacujo.net> - 2015-03-16 09:12 +0200
                Re: generator/coroutine terminology Chris Angelico <rosuav@gmail.com> - 2015-03-16 18:21 +1100
                Re: generator/coroutine terminology Marko Rauhamaa <marko@pacujo.net> - 2015-03-16 09:40 +0200
                Re: generator/coroutine terminology Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-16 22:59 +1100
                Re: generator/coroutine terminology Ian Kelly <ian.g.kelly@gmail.com> - 2015-03-16 01:37 -0600
                Re: generator/coroutine terminology Marko Rauhamaa <marko@pacujo.net> - 2015-03-16 09:52 +0200
                Re: generator/coroutine terminology Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-16 23:02 +1100
                Re: generator/coroutine terminology Marko Rauhamaa <marko@pacujo.net> - 2015-03-16 14:42 +0200
                Re: generator/coroutine terminology Jonas Wielicki <jonas@wielicki.name> - 2015-03-16 13:39 +0100
                Re: generator/coroutine terminology Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-16 19:36 +1100
                Re: generator/coroutine terminology Chris Angelico <rosuav@gmail.com> - 2015-03-16 19:58 +1100
                Re: generator/coroutine terminology Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-16 22:51 +1100
                Re: generator/coroutine terminology Chris Angelico <rosuav@gmail.com> - 2015-03-17 00:16 +1100
                Re: generator/coroutine terminology Marko Rauhamaa <marko@pacujo.net> - 2015-03-16 14:32 +0200
                Re: generator/coroutine terminology Rustom Mody <rustompmody@gmail.com> - 2015-03-16 05:51 -0700
                Re: generator/coroutine terminology Marko Rauhamaa <marko@pacujo.net> - 2015-03-16 15:13 +0200
                Re: generator/coroutine terminology Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-17 01:32 +1100
                Re: generator/coroutine terminology Ian Kelly <ian.g.kelly@gmail.com> - 2015-03-16 08:45 -0600
                Re: generator/coroutine terminology Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-17 00:39 +1100
                Re: generator/coroutine terminology Rustom Mody <rustompmody@gmail.com> - 2015-03-16 07:19 -0700
                Re: generator/coroutine terminology Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-03-16 14:26 +0000
                Re: generator/coroutine terminology Rustom Mody <rustompmody@gmail.com> - 2015-03-16 07:37 -0700
                Re: generator/coroutine terminology Rustom Mody <rustompmody@gmail.com> - 2015-03-16 07:55 -0700
                Re: generator/coroutine terminology Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-03-16 18:19 +0000
                Re: generator/coroutine terminology Rustom Mody <rustompmody@gmail.com> - 2015-03-16 19:52 -0700
                Re: generator/coroutine terminology Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-03-17 03:07 +0000
                Re: generator/coroutine terminology Rustom Mody <rustompmody@gmail.com> - 2015-03-16 20:18 -0700
                Re: generator/coroutine terminology Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-03-17 03:25 +0000
                Re: generator/coroutine terminology Rustom Mody <rustompmody@gmail.com> - 2015-03-16 20:33 -0700
                Re: generator/coroutine terminology Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-03-17 03:55 +0000
                Re: generator/coroutine terminology Mario Figueiredo <marfig@gmail.com> - 2015-03-17 04:22 +0100
                Re: generator/coroutine terminology Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-17 01:35 +1100
                Re: generator/coroutine terminology Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-17 01:36 +1100
                Re: generator/coroutine terminology Ian Kelly <ian.g.kelly@gmail.com> - 2015-03-16 08:52 -0600
                Re: generator/coroutine terminology Marko Rauhamaa <marko@pacujo.net> - 2015-03-16 17:09 +0200
                Re: generator/coroutine terminology Ian Kelly <ian.g.kelly@gmail.com> - 2015-03-16 09:26 -0600
                Re: generator/coroutine terminology Marko Rauhamaa <marko@pacujo.net> - 2015-03-16 18:05 +0200
                Re: generator/coroutine terminology albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-03-31 13:18 +0000
                Re: generator/coroutine terminology Dave Angel <davea@davea.name> - 2015-03-31 09:38 -0400
                Re: generator/coroutine terminology albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-03-31 15:03 +0000
                Re: generator/coroutine terminology Chris Angelico <rosuav@gmail.com> - 2015-04-01 02:36 +1100
                Re: generator/coroutine terminology Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-04-03 17:02 +1100
                Re: generator/coroutine terminology albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-04-18 17:52 +0000
                Re: generator/coroutine terminology Paul Rubin <no.email@nospam.invalid> - 2015-04-02 23:46 -0700
  Re: generator/coroutine terminology Terry Reedy <tjreedy@udel.edu> - 2015-03-12 16:11 -0400
    Re: generator/coroutine terminology Marko Rauhamaa <marko@pacujo.net> - 2015-03-12 22:22 +0200

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