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Thu Mar 27 12:24:49 CET 2014 · https://mail.python.org/pipermail/python-dev/2014-March/133582.html

On Tue, 25 Mar 2014 15:37:11 -0700
Ethan Furman <ethan at stoneleaf.us> wrote:
> 
> ``%a`` will call ``ascii()`` on the interpolated value.  This is intended
> as a debugging aid, rather than something that should be used in production.
> Non-ASCII values will be encoded to either ``\xnn`` or ``\unnnn``
> representation.  Use cases include developing a new protocol and writing
> landmarks into the stream; debugging data going into an existing protocol
> to see if the problem is the protocol itself or bad data; a fall-back for a
> serialization format; or even a rudimentary serialization format when
> defining ``__bytes__`` would not be appropriate [8].

The "use cases" you are enumerating for "%a" are chimeric. Did you
*actually* do those things in real life, or are you inventing them for
the PEP?

Regards

Antoine.

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Showing content from https://mail.python.org/pipermail/python-dev/2014-March/133582.html below:

[Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 3