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Groups > comp.lang.python > #40837

Re: Unhelpful traceback

Date 2013-03-07 19:23 -0500
From Dave Angel <davea@davea.name>
Subject Re: Unhelpful traceback
References <kh9c95$t68$1@dont-email.me> <mailman.3016.1362661824.2939.python-list@python.org> <khb0d7$q74$1@dont-email.me>
Newsgroups comp.lang.python
Message-ID <mailman.3063.1362702220.2939.python-list@python.org> (permalink)

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On 03/07/2013 04:23 PM, John Nagle wrote:
>
>>   <snip>
>
>      raise RuntimeError, 'open() requires mode "r", "U", or "rU"'
> RuntimeError: open() requires mode "r", "U", or "rU"
>
>     "b" for files is about end of line handling (CR LF -> LF), anyway.
>

Only for Python 2.  Since originally you didn't specify, I took my best 
shot. If you omit the 'b' opening a binary file in Python 3, you'd get 
problems similar to yours.  Text files will be converted to Unicode.

That's one of the reasons that specifying the full environment is important.

-- 
DaveA

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Thread

Unhelpful traceback John Nagle <nagle@animats.com> - 2013-03-06 22:33 -0800
  Re: Unhelpful traceback Andrew Berg <bahamutzero8825@gmail.com> - 2013-03-07 00:57 -0600
  Re: Unhelpful traceback Chris Rebert <clp2@rebertia.com> - 2013-03-06 23:04 -0800
  Re: Unhelpful traceback Dave Angel <davea@davea.name> - 2013-03-07 08:10 -0500
    Re: Unhelpful traceback John Nagle <nagle@animats.com> - 2013-03-07 10:42 -0800
      Re: Unhelpful traceback John Nagle <nagle@animats.com> - 2013-03-07 14:13 -0800
        Re: Unhelpful traceback Ian Kelly <ian.g.kelly@gmail.com> - 2013-03-07 15:32 -0700
    Re: Unhelpful traceback John Nagle <nagle@animats.com> - 2013-03-07 13:23 -0800
      Re: Unhelpful traceback Dave Angel <davea@davea.name> - 2013-03-07 19:23 -0500

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