[issue30526] Allow setting line_buffering on existing TextIOWrapper

[Antoine Pitrou]

Antoine Pitrou added the comment:

Le 01/06/2017 à 12:41, Serhiy Storchaka a écrit :
> 
> First at all, I'm not sure that allowing to modify TextIOWrapper settings after creation is a good idea. I would be feeling uncomfortable if the third-party library changed the buffering or encoding settings of passed text stream for its own needs, and this stream is sys.stdout.

Agreed that third-party libraries should not, but we're talking about
applications here.

> For example set f.line_buffering = False for performance and break your logging. Creating a new TextIOWrapper for own needs looks safer.

Now you may have two TextIOWrappers alive wrapping the same buffered IO
object.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30526>
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