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Re: Will file be closed automatically in a "for ... in open..." statement?

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From Terry Reedy <tjreedy@udel.edu>
Newsgroups comp.lang.python
Subject Re: Will file be closed automatically in a "for ... in open..." statement?
Date Tue, 16 Feb 2016 04:41:56 -0500
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On 2/16/2016 3:39 AM, jfong@ms4.hinet.net wrote:
> I know
>
>      with open('foo.txt') as f:
>          ...do something...
>
> will close the file automatically when the "with" block ends.
>
> I also saw codes in a book:
>
>      for line in open('foo.txt'):
> 	...do something...

Some books were originally written before 'with context_manager' was 
added, or a little later, before it became the normal thing to do.

-- 
Terry Jan Reedy

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Thread

Will file be closed automatically in a "for ... in open..." statement? jfong@ms4.hinet.net - 2016-02-16 00:39 -0800
  Re: Will file be closed automatically in a "for ... in open..." statement? Chris Angelico <rosuav@gmail.com> - 2016-02-16 20:16 +1100
  Re: Will file be closed automatically in a "for ... in open..." statement? Cameron Simpson <cs@zip.com.au> - 2016-02-16 20:24 +1100
  Re: Will file be closed automatically in a "for ... in open..." statement? Terry Reedy <tjreedy@udel.edu> - 2016-02-16 04:41 -0500
  Re: Will file be closed automatically in a "for ... in open..." statement? jfong@ms4.hinet.net - 2016-02-16 20:04 -0800
    Re: Will file be closed automatically in a "for ... in open..." statement? Chris Angelico <rosuav@gmail.com> - 2016-02-17 15:36 +1100
    Re: Will file be closed automatically in a "for ... in open..." statement? Raspberry Aether <raspberryaether@e-s.invalid> - 2016-02-16 23:42 -0500
    Re: Will file be closed automatically in a "for ... in open..." statement? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-02-17 16:51 +1100
      Re: Will file be closed automatically in a "for ... in open..." statement? Tim Chase <python.list@tim.thechases.com> - 2016-02-17 20:32 -0600
  Re: Will file be closed automatically in a "for ... in open..." statement? jfong@ms4.hinet.net - 2016-02-17 17:29 -0800
    Re: Will file be closed automatically in a "for ... in open..." statement? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-02-18 02:05 +0000
  Re: Will file be closed automatically in a "for ... in open..." statement? Jeremy Leonard <jrmy.lnrd@gmail.com> - 2016-02-18 10:02 -0800

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