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

Daniel Holth dholth at gmail.com
Mon Jan 13 03:07:27 CET 2014

On Sun, Jan 12, 2014 at 8:27 PM, Ethan Furman <ethan at stoneleaf.us> wrote:

On 01/12/2014 04:47 PM, Guido van Rossum wrote:

%s seems the trickiest: I think with a bytes argument it should just insert those bytes (and the padding modifiers should work too), and for other types it should probably work like %a, so that it works as expected for numeric values, and with a string argument it will return the ascii()-variant of its repr(). Examples: b'%s' % 42 == b'42' b'%s' % 'x' == b"'x'" (i.e. the three-byte string containing an 'x' enclosed in single quotes) I'm not sure about the quotes. Would anyone ever actually want those in the byte stream? -- Ethan

Is there a formatting character that means "anything except a unicode string" to prevent accidentally interpolating a Unicode string into a bytes string without [a sane] encoding?

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