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Re: open() and EOFError

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From Terry Reedy <tjreedy@udel.edu>
Subject Re: open() and EOFError
Date Mon, 07 Jul 2014 14:49:56 -0400
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On 7/7/2014 8:39 AM, Roy Smith wrote:

> On a different topic, I've always disliked embedding instructions to
> "type Ctrl-D".  The problem is, how to generate an EOF (or interrupt, or
> whatever) is configurable in the tty driver (see below).  In theory, the
> user could have remapped EOF to be something else.  Maybe they're a
> die-hard Windows fan, and insist on being able to type Ctrl-Z for EOF.
> Not to mention that things like readline are probably running the
> terminal in raw mode and remapping everything all over again.
>
> On the other hand, telling the user to "generate EOF", while technically
> more correct, is not very useful for most people.  I suppose you could
> interrogate the tty driver to find out what the current EOF character
> is, and stick that in your prompt.  I don't even know if that's possible
> with the standard Python library, and I doubt it would be very portable.
> I'm not sure what the best solution is here.

Avoid EOFError. Much better, I think, is the somewhat customary

s = input("Enter something, or hit <return> to exit")
if not s: sys.exit()
else: <process s>

-- 
Terry Jan Reedy

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Thread

open() and EOFError Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-07-07 03:20 +0000
  Re: open() and EOFError Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-07-07 17:04 +1200
    Re: open() and EOFError Steven D'Aprano <steve@pearwood.info> - 2014-07-07 08:00 +0000
      Re: open() and EOFError Chris Angelico <rosuav@gmail.com> - 2014-07-07 18:09 +1000
      Re: open() and EOFError Dave Angel <davea@davea.name> - 2014-07-07 08:14 -0400
      Re: open() and EOFError Chris Angelico <rosuav@gmail.com> - 2014-07-07 22:19 +1000
        Re: open() and EOFError Roy Smith <roy@panix.com> - 2014-07-07 08:46 -0400
          Re: open() and EOFError Chris Angelico <rosuav@gmail.com> - 2014-07-07 22:58 +1000
            Re: open() and EOFError Roy Smith <roy@panix.com> - 2014-07-07 20:26 -0400
          Re: open() and EOFError Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-07-08 09:50 +1200
        Re: open() and EOFError Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-07-07 15:45 +0000
          Re: open() and EOFError Chris Angelico <rosuav@gmail.com> - 2014-07-08 01:53 +1000
          Re: open() and EOFError Marko Rauhamaa <marko@pacujo.net> - 2014-07-07 19:08 +0300
            Re: open() and EOFError Marko Rauhamaa <marko@pacujo.net> - 2014-07-07 19:12 +0300
      Re: open() and EOFError Roy Smith <roy@panix.com> - 2014-07-07 08:39 -0400
        Re: open() and EOFError Chris Angelico <rosuav@gmail.com> - 2014-07-07 22:55 +1000
          Re: open() and EOFError Roy Smith <roy@panix.com> - 2014-07-07 20:28 -0400
        Re: open() and EOFError Terry Reedy <tjreedy@udel.edu> - 2014-07-07 14:49 -0400
          Re: open() and EOFError Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-07-08 10:04 +1200
            Re: open() and EOFError Grant Edwards <invalid@invalid.invalid> - 2014-07-08 14:19 +0000
              Re: open() and EOFError Terry Reedy <tjreedy@udel.edu> - 2014-07-08 11:08 -0400
              Re: open() and EOFError Tim Chase <python.list@tim.thechases.com> - 2014-07-08 10:20 -0500
              Re: open() and EOFError Chris Angelico <rosuav@gmail.com> - 2014-07-09 01:24 +1000
              Re: open() and EOFError Tim Chase <python.list@tim.thechases.com> - 2014-07-08 10:46 -0500
                Re: open() and EOFError Roy Smith <roy@panix.com> - 2014-07-08 21:05 -0400
                Re: open() and EOFError Anssi Saari <as@sci.fi> - 2014-07-10 22:40 +0300
              Re: open() and EOFError Chris Angelico <rosuav@gmail.com> - 2014-07-09 01:49 +1000
              Re: ^D vs ^Z as EOF and DOS dinosaurs talking (was: open() and EOFError) Tim Chase <python.list@tim.thechases.com> - 2014-07-08 10:57 -0500
                Re: ^D vs ^Z as EOF and DOS dinosaurs talking (was: open() and EOFError) Jan van den Broek <balglaas@xs4all.nl> - 2014-07-08 16:38 +0000
              Re: ^D vs ^Z as EOF and DOS dinosaurs talking (was: open() and EOFError) Chris Angelico <rosuav@gmail.com> - 2014-07-09 02:20 +1000
              Re: open() and EOFError Tim Chase <python.list@tim.thechases.com> - 2014-07-08 11:40 -0500
              Re: open() and EOFError Chris Angelico <rosuav@gmail.com> - 2014-07-09 02:50 +1000
          Re: open() and EOFError Steven D'Aprano <steve@pearwood.info> - 2014-07-08 09:03 +0000
            Re: open() and EOFError Chris Angelico <rosuav@gmail.com> - 2014-07-08 20:29 +1000
      Re: open() and EOFError Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-07-07 14:06 +0100
      Re: open() and EOFError Chris Angelico <rosuav@gmail.com> - 2014-07-07 23:27 +1000
      Re: open() and EOFError Chris Angelico <rosuav@gmail.com> - 2014-07-07 23:29 +1000
      Re: open() and EOFError Dan Stromberg <drsalists@gmail.com> - 2014-07-07 09:07 -0700
      Re: open() and EOFError Ian Kelly <ian.g.kelly@gmail.com> - 2014-07-07 11:25 -0600
        Re: open() and EOFError Marko Rauhamaa <marko@pacujo.net> - 2014-07-07 20:31 +0300
          Re: open() and EOFError Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-07-07 18:07 +0000
            Re: open() and EOFError Marko Rauhamaa <marko@pacujo.net> - 2014-07-07 21:42 +0300
            Re: open() and EOFError Roy Smith <roy@panix.com> - 2014-07-07 20:22 -0400
          Re: open() and EOFError Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-07-08 10:09 +1200
            Re: open() and EOFError Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-07-08 00:10 +0100
            Re: open() and EOFError "Neil D. Cerutti" <neilc@norwich.edu> - 2014-07-08 10:29 -0400
      Re: open() and EOFError Chris Angelico <rosuav@gmail.com> - 2014-07-08 03:29 +1000
        Re: open() and EOFError Marko Rauhamaa <marko@pacujo.net> - 2014-07-07 20:40 +0300
          Re: open() and EOFError Chris Angelico <rosuav@gmail.com> - 2014-07-08 10:55 +1000
      Re: open() and EOFError Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-07-07 18:54 -0400

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