Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!news.mixmin.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed4.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path: <kwatch@gmail.com>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.004
X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'essentially': 0.04; 'syntax': 0.04; "subject:' ": 0.07; 'val': 0.09; 'item:': 0.16; 'iterable': 0.16; 'iterable:': 0.16; 'iterators,': 0.16; 'subject:yield': 0.16; 'url:whatsnew': 0.16; 'xs:': 0.16; 'subject:] ': 0.20; 'to:name:python-list@python.org': 0.22; 'question': 0.24; '&gt;': 0.26; 'message-id:@mail.gmail.com': 0.30; 'url:python': 0.33; 'subject:from': 0.34; 'received:google.com': 0.35; 'yield': 0.36; 'url:org': 0.36; 'to:addr:python-list': 0.38; 'skip:- 10': 0.38; 'subject:[': 0.39; 'quote': 0.39; 'to:addr:python.org': 0.39; 'url:3': 0.61; 'simple': 0.61
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=HFiRNa+xXTpFa94o3SbWKWMrLy3VwyfMAhBFgQL4bJ8=; b=voWWzivKcATov6XdPhE6WbZPhSFaB6jL5CJSJpVZf4bfnx3ZfcZ9PlJDQBl5egbP/0 ahxvf4Xn/3e3XBVIxSX4QhX+f6To+nrsMJ6VFNamTlynWAU8sJrWiFo13KJ1+llWYUGD LbDKiMK/YNPDjW6OacZvsUdVTNhzSonb9g3Qz38kba/CG4KDbtfsYDrWWoD8W0ukJc/f gykv9jkE70Ek7iXOZaQwtE/V3OVkv2u+SBIkezl73LKTJ/VPV43jeaPGwU6AGHobyTux 245eYmjCMKbh0BNR5BTFjagxEV1uRzrH6FKW8Wfey+3+pW5cqDQnOzRfm1GMYLPqGd6P axAg==
MIME-Version: 1.0
X-Received: by 10.43.167.196 with SMTP id nf4mr13038363icc.22.1408008936946; Thu, 14 Aug 2014 02:35:36 -0700 (PDT)
Date: Thu, 14 Aug 2014 18:35:36 +0900
Subject: [Q] is 'yield from' syntax sugar for 'for'+'yield'?
From: Makoto Kuwata <kwatch@gmail.com>
To: "python-list@python.org" <python-list@python.org>
Content-Type: multipart/alternative; boundary=001a11c2d676870478050093a024
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.12988.1408008940.18130.python-list@python.org>
Lines: 59
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1408008940 news.xs4all.nl 2838 [2001:888:2000:d::a6]:37899
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:76287

--001a11c2d676870478050093a024
Content-Type: text/plain; charset=UTF-8

Question about 'yield from'.

I understand that::

    yield from xs

is syntax suger of::

    for x in xs:
      yield x

And::

    val = yield from xs

is same as::

    for x in xs:
      ret = yield x
    val = ret

Is it true? Do I understand correctly?


quote from
https://docs.python.org/3/whatsnew/3.3.html#pep-380-syntax-for-delegating-to-a-subgenerator
> For simple iterators, yield from iterable is essentially
> just a shortened form of for item in iterable: yield item:

--
regards,
kwatch

--001a11c2d676870478050093a024
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Question about &#39;yield from&#39;.</div><div><br></=
div><div>I understand that::</div><div><br></div><div>=C2=A0 =C2=A0 yield f=
rom xs</div><div><br></div><div>is syntax suger of::</div><div><br></div><d=
iv>=C2=A0 =C2=A0 for x in xs:</div>
<div>=C2=A0 =C2=A0 =C2=A0 yield x</div><div><br></div><div>And::</div><div>=
<br></div><div>=C2=A0 =C2=A0 val =3D yield from xs</div><div><br></div><div=
>is same as::</div><div><br></div><div>=C2=A0 =C2=A0 for x in xs:</div><div=
>=C2=A0 =C2=A0 =C2=A0 ret =3D yield x</div><div>=C2=A0 =C2=A0 val =3D ret</=
div>
<div><br></div><div>Is it true? Do I understand correctly?</div><div><br></=
div><div><br></div><div>quote from <a href=3D"https://docs.python.org/3/wha=
tsnew/3.3.html#pep-380-syntax-for-delegating-to-a-subgenerator">https://doc=
s.python.org/3/whatsnew/3.3.html#pep-380-syntax-for-delegating-to-a-subgene=
rator</a></div>
<div>&gt; For simple iterators, yield from iterable is essentially</div><di=
v>&gt; just a shortened form of for item in iterable: yield item:</div><div=
><br></div><div>--</div><div>regards,</div><div>kwatch</div></div>

--001a11c2d676870478050093a024--