[Python-Dev] PEP 460 reboot (original) (raw)

Guido van Rossum guido at python.org
Mon Jan 13 04:45:13 CET 2014

On Sun, Jan 12, 2014 at 6:16 PM, Ethan Furman <ethan at stoneleaf.us> wrote:

In reference to a byte stream, if you do:

--> b'%s' % 'some text'.encode('cp1241') it's really just bytes into bytes.

That's a confusing example -- it would be clearer to just show

b'%s' % b'some text'

If you do :

--> b'%s' % 'some text' then the encoding is ASCII with strict error checking. So if it's not representable as clean ASCII either encode it manually, or prepare for it to blow up with an UnicodeEncodeError.

You don't say what outcome you want, but if you wanted b'%s' % 'some text' to return b'some text' while b'%s' % '\u1234' should blow up, you're back at the Python 2 approach and that is the last thing I want.

-- --Guido van Rossum (python.org/~guido)

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