Re: base64.b64encode(data)

From	Gregory Ewing <greg.ewing@canterbury.ac.nz>
Newsgroups	comp.lang.python
Subject	Re: base64.b64encode(data)
Date	2016-06-14 11:12 +1200
Message-ID	<ds8sulF9u79U1@mid.individual.net> (permalink)
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Chris Angelico wrote:
> Maybe what Python needs is an "ascii" type that's a subclass of both
> str and bytes, and requires that the contents be <0x80. It is text, so
> it can be combined with text strings; but it is also bytes, so when
> you combine it with bytes strings, it'll behave as most people expect.

That would be asking for trouble, I think. It would be
letting back in a bit of the text/bytes confusion that
Python 3 worked hard to get rid of. What happens if the
bytes that you combine it with aren't in an ascii-compatible
encoding? Nothing would detect that error.

The only thing you might gain is a bit of efficiency by
removing some encoding/decoding operations. But since the
FSR, these are pretty cheap anyway when the characters are all
ascii.

They could maybe be made a bit cheaper still by arranging
some way for a bytes object and an ascii-only str object
to share underlying storage.

-- 
Greg

Thread

base64.b64encode(data) Marcin Rak <mrak@sightlineinnovation.com> - 2016-06-12 11:56 -0700
  Re: base64.b64encode(data) Marko Rauhamaa <marko@pacujo.net> - 2016-06-12 22:26 +0300
  Re: base64.b64encode(data) Steven D'Aprano <steve@pearwood.info> - 2016-06-13 12:22 +1000
    Re: base64.b64encode(data) Random832 <random832@fastmail.com> - 2016-06-12 23:20 -0400
      Re: base64.b64encode(data) Steven D'Aprano <steve@pearwood.info> - 2016-06-13 15:16 +1000
        Re: base64.b64encode(data) Random832 <random832@fastmail.com> - 2016-06-13 01:33 -0400
          Re: base64.b64encode(data) Marko Rauhamaa <marko@pacujo.net> - 2016-06-13 09:45 +0300
          Re: base64.b64encode(data) Steven D'Aprano <steve@pearwood.info> - 2016-06-13 20:35 +1000
            Re: base64.b64encode(data) Random832 <random832@fastmail.com> - 2016-06-13 09:36 -0400
              Re: base64.b64encode(data) Steven D'Aprano <steve@pearwood.info> - 2016-06-22 01:56 +1000
            Re: base64.b64encode(data) Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2016-06-13 20:20 -0400
        Re: base64.b64encode(data) Michael Torrie <torriem@gmail.com> - 2016-06-13 09:15 -0600
          Re: base64.b64encode(data) Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-06-14 11:04 +1200
        Re: base64.b64encode(data) Chris Angelico <rosuav@gmail.com> - 2016-06-14 03:07 +1000
          Re: base64.b64encode(data) Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-06-14 11:12 +1200
            Re: base64.b64encode(data) Random832 <random832@fastmail.com> - 2016-06-13 21:19 -0400

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