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From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: what is best method to set sys.stdout to utf-8?
Date: Wed, 07 Mar 2012 19:12:59 -0500
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Xref: csiph.com comp.lang.python:21363

On 3/7/2012 3:57 PM, Peter Kleiweg wrote:
>
> In Python 3, there seem to be two ways to set sys.stdout to
> utf-8 after the script has started:
>
>      sys.stdout = codecs.getwriter('utf-8')(sys.stdout.detach())
>
>      sys.stdout = io.TextIOWrapper(sys.stdout.detach(), encoding='utf-8')
>
> I guess the second is better. At start-up, type(sys.stdout) is
> <class '_io.TextIOWrapper'>, and it's also after using the
> second method.
>
> After using the first method, type(sys.stdout) is changed to
> <class 'encodings.utf_8.StreamWriter'>.
>
> Should I always use the second method?

I would. The io module is more recent an partly replaces codecs. The 
latter remains for back compatibility and whatever it can do that io cannot.

-- 
Terry Jan Reedy