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To: python-list@python.org
From: "Frank Millman" <frank@chagford.com>
Subject: Re: Unicode, stdout, and stderr
Date: Tue, 22 Jul 2014 09:41:38 +0200
References: <lqkvn0$ptp$1@ger.gmane.org> <lql3am$2q7$1@ger.gmane.org>
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"Peter Otten" <__peter__@web.de> wrote in message 
news:lql3am$2q7$1@ger.gmane.org...
> Frank Millman wrote:
>
>> Hi all
>>
>> This is not important, but I would appreciate it if someone could explain
>> the following, run from cmd.exe on Windows Server 2003 -
>>
>> C:\>python
>> Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 10:38:22) [MSC v.1600 32
>> bit (In
>> tel)] on win32
>> Type "help", "copyright", "credits" or "license" for more information.
>>>>> x = '\u2119'
>>>>> x  # this uses stderr
>> '\u2119'
>
> No, both print to stdout, but just
>
>>>> x
>
> is passed to the display hook of the interactive interpreter. This applies
> repr() and  then tries to print the result. If this fails it makes another
> effort, roughly (the actual code is written in C)
>
> sys.stdout.buffer.write(repr(x).encode(
>    sys.stdout.encoding, "backslashreplace"))
>
>

Thanks, Peter. Very interesting.

Out of interest, does the same thing happen when writing to sys.stderr?

Frank