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Re: Best way to rewrite Popen

References <87siastsby.fsf@Equus.decebal.nl> <CAPTjJmpMApx8Ptm=fcstWDY5MxZsLn5T7_Yod4QCyHWYHKAGOg@mail.gmail.com> <CAKJDb-PBHtBpF_U6ug7zPJQTdH1vzFjz=SLAuW-2o8RYqhdG8Q@mail.gmail.com>
Date 2015-05-20 04:13 +1000
Subject Re: Best way to rewrite Popen
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.152.1432059241.17265.python-list@python.org> (permalink)

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On Wed, May 20, 2015 at 3:55 AM, Zachary Ware
<zachary.ware+pylist@gmail.com> wrote:
>> def capture_stdout(*a, **kw):
>>     if 'stdout' not in kw: kw['stdout'] = subprocess.PIPE
>
> Just a quick note that this line can be simplified nicely to:
>
> kw.setdefault('stdout', subprocess.PIPE)

Yes, in the simple case. That does require pre-evaluating
subprocess.PIPE though, which in some situations is an important
distinction. But you're right, for something this simple, the
repetition is superfluous. Good catch.

ChrisA

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Thread

Best way to rewrite Popen Cecil Westerhof <Cecil@decebal.nl> - 2015-05-19 19:01 +0200
  Re: Best way to rewrite Popen Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2015-05-19 17:36 +0000
    Re: Best way to rewrite Popen Cecil Westerhof <Cecil@decebal.nl> - 2015-05-19 21:13 +0200
      Re: Best way to rewrite Popen Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2015-05-19 20:14 +0000
      Re: Best way to rewrite Popen Cecil Westerhof <Cecil@decebal.nl> - 2015-05-19 22:19 +0200
        Re: Best way to rewrite Popen Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2015-05-19 21:28 +0000
          Re: Best way to rewrite Popen Cecil Westerhof <Cecil@decebal.nl> - 2015-05-20 00:23 +0200
            Re: Best way to rewrite Popen MRAB <python@mrabarnett.plus.com> - 2015-05-20 00:20 +0100
              Re: Best way to rewrite Popen Cecil Westerhof <Cecil@decebal.nl> - 2015-05-20 02:15 +0200
  Re: Best way to rewrite Popen Jonas Wielicki <jonas@wielicki.name> - 2015-05-19 19:43 +0200
  Re: Best way to rewrite Popen Chris Angelico <rosuav@gmail.com> - 2015-05-20 03:47 +1000
  Re: Best way to rewrite Popen Zachary Ware <zachary.ware+pylist@gmail.com> - 2015-05-19 12:55 -0500
  Re: Best way to rewrite Popen Chris Angelico <rosuav@gmail.com> - 2015-05-20 04:13 +1000
  Re: Best way to rewrite Popen Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-05-20 03:23 +0200

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