Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #104344

Re: Pythonic love

Path csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail
From justin walters <walters.justin01@gmail.com>
Newsgroups comp.lang.python
Subject Re: Pythonic love
Date Tue, 8 Mar 2016 08:49:43 -0800
Lines 51
Message-ID <mailman.48.1457455785.15725.python-list@python.org> (permalink)
References <nbl0lo$5o5$1@gioia.aioe.org> <nbmjrf$jrd$1@ger.gmane.org>
Mime-Version 1.0
Content-Type text/plain; charset=UTF-8
X-Trace news.uni-berlin.de pS7ugQViP4L+p/ge0W0fJg69IZsNiTomx1UzXSMVZsZQ==
Return-Path <walters.justin01@gmail.com>
X-Original-To python-list@python.org
Delivered-To python-list@mail.python.org
X-Spam-Status OK 0.002
X-Spam-Evidence '*H*': 1.00; '*S*': 0.00; 'lines.': 0.07; 'cc:addr :python-list': 0.09; 'generators': 0.09; 'wrong,': 0.09; 'python': 0.10; 'things.': 0.15; '2016': 0.16; 'lambda': 0.16; 'received:io': 0.16; 'received:psf.io': 0.16; 'wrote:on': 0.16; '\xc2\xa0if': 0.16; 'wrote:': 0.16; 'memory': 0.17; '&lt;': 0.18; 'skip': 0.18; 'skip:l 30': 0.18; '(not': 0.20; 'cc:2**0': 0.20; 'cc:addr:python.org': 0.20; 'cc:no real name:2**0': 0.22; 'am,': 0.23; 'slightly': 0.23; 'header:In-Reply-To:1': 0.24; 'wonder': 0.27; 'message-id:@mail.gmail.com': 0.27; 'yield': 0.27; 'correct': 0.28; 'function': 0.28; 'values': 0.28; 'skip:( 20': 0.28; 'perl': 0.29; "i'm": 0.30; 'print': 0.30; 'url:mailman': 0.30; 'statement': 0.32; 'url:python': 0.33; 'usually': 0.33; 'url:listinfo': 0.34; 'list': 0.34; 'received:google.com': 0.35; 'skip:( 30': 0.35; 'could': 0.35; 'files,': 0.35; 'quite': 0.35; 'received:74.125.82': 0.35; 'but': 0.36; 'should': 0.36; 'url:org': 0.36; 'possible.': 0.36; 'pm,': 0.36; 'subject:: ': 0.37; 'skip:& 10': 0.37; 'thanks': 0.37; 'things': 0.38; 'url:mail': 0.40; 'here.': 0.62; 'more': 0.63; 'mar': 0.65; 'skip:\xc2 10': 0.67
DKIM-Signature v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc; bh=38OP8LGe4z97LJDEbFrNN7Pq2Z7QFYi3/9QUaikOPMw=; b=I6TVGVn//jmcD+8VSHQml9lC0ARTOiCaP078zR3o9u/R9659HSZ+5BJ93Y9sbC5+Dh 3lCGC5EoHwVnxXJjcnvPVgVfLWrBM5gHXi8Wx8Ayx5vR62t2WoBdNlzWYm9xrHKZqfIh V0KflOSqkd1dirsyUbqbHJTANsmMiHIA7ak++SiDr8ovz3Ko31UI1vUfYsSmtC2hRWa+ J1eeGBTvL3PZ6mj4ZjDUgVupTCW8MDA3iMGziXB1RxqXTFAIh7IHjTf0w3KKqZuUiWCE QDHa8gXE/qDNDWFEUpgwzC96x/8ap/1AwgldS56TYYKFO0HDobuUtLEJJWY4RifW4yiZ iFgg==
X-Google-DKIM-Signature v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc; bh=38OP8LGe4z97LJDEbFrNN7Pq2Z7QFYi3/9QUaikOPMw=; b=QS0o0Z7pKDvbi3jCPFTPFdM42j7DlgGvAlBzIW7wyZlzujbgJG37RhqwdlX0aSWj4V ZFrCTCoE5h1LMRNCfZyddazWRoNoe8uIWhGR9qWpYy3K7nglsiIvNJDhS4+tIY+la9OE OtltHcYXTWwmiAp4mgEgp/Y2s9kxySQf8dICJk1/AtIoCEKH//bmNFktofv95HAZlWYA IyUBF/ARoE2C/Euxkqop0F119g9kDay5LO0eteqNAF/BNZYauCQyj7QGiKmbye9NVwf+ KG6vaafrbTX1jqXITzRjw3N3Offdr8xkGhVe2ajO55MY6ME2yT8Cx+bCiwJnMxagbZ0X Cnsw==
X-Gm-Message-State AD7BkJITe+jYfy36t/TmVw8NpBhAu7O0Hu8voVeQ4uCNHaUUDU8Pw6jJgEGCAoznKLh/by+e9IfIFUyPBNA5yQ==
X-Received by 10.194.115.8 with SMTP id jk8mr32454227wjb.136.1457455783994; Tue, 08 Mar 2016 08:49:43 -0800 (PST)
In-Reply-To <nbmjrf$jrd$1@ger.gmane.org>
X-Content-Filtered-By Mailman/MimeDel 2.1.21
X-BeenThere python-list@python.org
X-Mailman-Version 2.1.21
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>
Xref csiph.com comp.lang.python:104344

Show key headers only | View raw

Correct me if I'm wrong, but don't python generators usually use the yield
statement so they can be used in list comprehensions?
On Mar 8, 2016 5:27 AM, "jmp" <jeanmichel@sequans.com> wrote:

> On 03/07/2016 11:51 PM, Fillmore wrote:
>
>>
>> learning Python from Perl here. Want to do things as Pythonicly as
>> possible.
>>
>> I am reading a TSV, but need to skip the first 5 lines. The following
>> works, but wonder if there's a more pythonc way to do things. Thanks
>>
>> ctr = 0
>> with open(prfile,mode="rt",encoding='utf-8') as pfile:
>>      for line in pfile:
>>          ctr += 1
>>
>>          if ctr < 5:
>>              continue
>>
>>          allVals = line.strip().split("\t")
>>          print(allVals)
>>
>
> what about a generator expression ? The (not so)new hype:
>
> with open(prfile,mode="rt",encoding='utf-8') as pfile:
>   for values in (l.strip().split("\t") for (i, l) in enumerate(pfile) if i
> >=5):
>     print values
>
> slightly dense, could be better with a lambda function
>
> tovalues = lambda l: l.strip().split("\t")
> with open(prfile,mode="rt",encoding='utf-8') as pfile:
>   for values in (tovalues(l) for (i, l) in enumerate(pfile) if i >=5):
>     print values
>
>
> This should even work quite efficiently on big files, because I don't
> thing no more than one line is in memory at a given time.
>
> jm
>
>
>
>
> --
> https://mail.python.org/mailman/listinfo/python-list
>

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Pythonic love Fillmore <fillmore_remove@hotmail.com> - 2016-03-07 17:51 -0500
  Re: Pythonic love Rob Gaddi <rgaddi@highlandtechnology.invalid> - 2016-03-07 22:52 +0000
  Re: Pythonic love sohcahtoa82@gmail.com - 2016-03-07 15:03 -0800
    Re: Pythonic love Fillmore <fillmore_remove@hotmail.com> - 2016-03-07 18:12 -0500
  Re: Pythonic love Ian Kelly <ian.g.kelly@gmail.com> - 2016-03-07 16:13 -0700
  Re: Pythonic love Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-07 23:19 +0000
  Re: Pythonic love jmp <jeanmichel@sequans.com> - 2016-03-08 14:25 +0100
  Re: Pythonic love justin walters <walters.justin01@gmail.com> - 2016-03-08 08:49 -0800
  Re: Pythonic love Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-08 16:55 +0000
  Re: Pythonic love jmp <jeanmichel@sequans.com> - 2016-03-08 18:00 +0100
  Re: Pythonic love justin walters <walters.justin01@gmail.com> - 2016-03-08 09:17 -0800
    Re: Pythonic love jstitch@invernalia.homelinux.net (Javier Novoa C.) - 2016-03-08 11:27 -0600
      Re: Pythonic love Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2016-03-08 21:10 -0500

csiph-web