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Mon Jan 13 22:40:03 CET 2014 · https://mail.python.org/pipermail/python-dev/2014-January/131452.html

On Mon, 13 Jan 2014 13:32:28 -0800
Guido van Rossum <guido at python.org> wrote:
> 
> But formatb() feels absurd to me. PEP 460 has neither a precise
> specification or any actual examples, so I can't tell whether the
> intention is that the format string can *only* contain {...} sequences
> or whether it can also contain "regular" characters. Translating to
> formatb(), my question comes down to the legality of the following
> example:
> 
>   b'Hello, {}'.formatb(name)  # Where name is some bytes object

Yes, it's allowed. But so is:

  b'\xff\x00{}\x85{}'.formatb(payload, trailer)

The ASCII bias is because of the bytes literal notation.

Regards

Antoine.

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[Python-Dev] PEP 460 reboot