[issue15903] Make rawiobase_read() read directly to bytes object

[Antoine Pitrou]

Antoine Pitrou added the comment:

> Antoine Pitrou <report at bugs.python.org> wrote:
> > I don't think we want to expose a mutable bytes object to outside code,
> > so IMO PyMemoryView_FromMemory() is preferrable.
> 
> I agree, but PyMemoryView_FromMemory(PyBytes_AS_STRING(b), n, PyBUF_WRITE)
> just hides the fact that a mutable bytes object is exposed.

Except that the mutable bytes object is not exposed to any outside code,
so that weird behaviour can't be observed.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue15903>
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