[Python-Dev] email package status in 3.X (original) (raw)

Toshio Kuratomi a.badger at gmail.com
Tue Jun 22 20:44:44 CEST 2010

On Tue, Jun 22, 2010 at 08:24:28AM -0500, Michael Urman wrote:

On Tue, Jun 22, 2010 at 00:28, Stephen J. Turnbull <stephen at xemacs.org> wrote: > Michael Urman writes: > >  > It is somewhat troublesome that there doesn't appear to be an obvious >  > built-in idempotent-when-possible function that gives back the >  > provided bytes/str, > > If you want something idempotent, it's already the case that > bytes(b'abc') => b'abc'.  What might be desirable is to make > bytes('abc') work and return b'abc', but only if 'abc' is pure ASCII > (or maybe ISO 8859/1).

By idempotent-when-possible, I mean tobytes(strorbytes, encoding, errors) that would pass an instance of bytes through, or encode an instance of str. And of course a tostr that performs similarly, passing str through and decoding bytes. While bytes(b'abc') will give me b'abc', neither bytes('abc') nor bytes(b'abc', 'latin-1') get me the b'abc' I want to see. A month or so ago, I finally broke down and wrote a python2 library that had these functions in it (along with a bunch of other trivial boilerplate functions that I found myself writing over and over in different projects)

https://fedorahosted.org/releases/k/i/kitchen/docs/api-text-converters.html#unicode-and-byte-str-conversion

I suppose I could port this to python3 and we could see if it gains adoption as a thirdparty addon. I have been hesitating over doing that since I don't use python3 for everyday work and I have a vague feeling that 2to3 won't understand what that code needs to do.

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