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Re: when does newlines get set in universal newlines mode?

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From Terry Reedy <tjreedy@udel.edu>
Subject Re: when does newlines get set in universal newlines mode?
Date Mon, 04 May 2015 13:38:43 -0400
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On 5/4/2015 9:35 AM, Davide Mancusi wrote:
>>> I believe this is a bug.
>>
>> I'm not sure it is, actually; imagine the text is coming in one
>> character at a time (eg from a pipe), and it's seen "alpha\r". It
>> knows that this is a line, so it emits it; but until the next
>> character is read, it can't know whether it's going to be \r or \r\n.
>> What should it do? Read another character, which might block? Put "\r"
>> into .newlines, which might be wrong? Once it sees the \n, it knows
>> that it was \r\n (or rather, it assumes that files do not have lines
>> of text terminated by \r followed by blank lines terminated by \n -
>> because that would be stupid).
>
> I think this is a good point. However, I will probably submit a bug
> report anyway and let the devs make their decisions. It is at least a
> documentation bug.

Be sure to report the exact python binary you are using, as reported 
when you start the interactive interpreter or Idle shell.

-- 
Terry Jan Reedy

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Thread

when does newlines get set in universal newlines mode? arekfu@gmail.com - 2015-05-04 02:50 -0700
  Re: when does newlines get set in universal newlines mode? Peter Otten <__peter__@web.de> - 2015-05-04 14:01 +0200
  Re: when does newlines get set in universal newlines mode? Chris Angelico <rosuav@gmail.com> - 2015-05-04 22:13 +1000
    Re: when does newlines get set in universal newlines mode? Davide Mancusi <arekfu@gmail.com> - 2015-05-04 06:35 -0700
      Re: when does newlines get set in universal newlines mode? Terry Reedy <tjreedy@udel.edu> - 2015-05-04 13:38 -0400
    Re: when does newlines get set in universal newlines mode? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-05-05 18:31 +1000
      Re: when does newlines get set in universal newlines mode? Chris Angelico <rosuav@gmail.com> - 2015-05-05 18:41 +1000
        Re: when does newlines get set in universal newlines mode? Davide Mancusi <arekfu@gmail.com> - 2015-05-05 02:23 -0700
          Re: when does newlines get set in universal newlines mode? Chris Angelico <rosuav@gmail.com> - 2015-05-05 19:28 +1000
            Re: when does newlines get set in universal newlines mode? Davide Mancusi <arekfu@gmail.com> - 2015-05-05 03:58 -0700
  Re: when does newlines get set in universal newlines mode? Peter Otten <__peter__@web.de> - 2015-05-04 17:17 +0200
  Re: when does newlines get set in universal newlines mode? Chris Angelico <rosuav@gmail.com> - 2015-05-05 01:26 +1000
  Re: when does newlines get set in universal newlines mode? Ian Kelly <ian.g.kelly@gmail.com> - 2015-05-04 09:33 -0600

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