Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #58969

Re: chunking a long string?

Show key headers only | View raw

On Sun, Nov 10, 2013 at 2:37 AM, Steven D'Aprano
<steve+comp.lang.python@pearwood.info> wrote:
> I think that Chris is wrong about Python "only" interning
> strings if you explicitly ask for it. I recall that Python will (may?)
> automatically intern strings which look like identifiers (e.g. "spam" but
> not "Hello World" or "123abc").

I'm pretty sure it's simply that literals are interned, or at least
shared across a module (and the interactive interpreter "counts" as a
module). And it might still only be ones which look like identifiers,
because:

>>> foo = "lorem ipsum dolor sit amet"
>>> bar = "lorem ipsum dolor sit amet"
>>> foo is bar
False

My "only" was false because of the sharing/interning of (some)
literals, which I'd forgotten about; however, there's still the
distinction that I was trying to draw, that in Python _some strings_
are interned (a feature you can explicitly request), rather than _all
strings_ being interned. And as is typical of python-list, it's this
extremely minor point that became the new course of the thread - my
main point was not whether all, some, or no strings get interned, but
that string interning makes the storage space of duplicate strings
immaterial :)

ChrisA

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

chunking a long string? Roy Smith <roy@panix.com> - 2013-11-08 12:48 -0500
  Re: chunking a long string? wxjmfauth@gmail.com - 2013-11-08 12:43 -0800
    Re: chunking a long string? Chris Angelico <rosuav@gmail.com> - 2013-11-09 07:53 +1100
    Re: chunking a long string? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-11-08 20:57 +0000
    Re: chunking a long string? Tim Chase <python.list@tim.thechases.com> - 2013-11-08 15:04 -0600
    Re: chunking a long string? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-11-08 21:06 +0000
    Re: chunking a long string? Chris Angelico <rosuav@gmail.com> - 2013-11-09 08:04 +1100
    Re: chunking a long string? Chris Angelico <rosuav@gmail.com> - 2013-11-09 08:17 +1100
    Re: chunking a long string? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-11-09 00:46 +0000
      Re: chunking a long string? wxjmfauth@gmail.com - 2013-11-09 00:14 -0800
        Re: chunking a long string? Chris Angelico <rosuav@gmail.com> - 2013-11-09 19:26 +1100
          Re: chunking a long string? Roy Smith <roy@panix.com> - 2013-11-09 09:37 -0500
            Re: chunking a long string? Chris Angelico <rosuav@gmail.com> - 2013-11-10 02:02 +1100
              Re: chunking a long string? Roy Smith <roy@panix.com> - 2013-11-09 10:21 -0500
                Re: chunking a long string? Chris Angelico <rosuav@gmail.com> - 2013-11-10 02:30 +1100
                Re: chunking a long string? Roy Smith <roy@panix.com> - 2013-11-09 10:35 -0500
            Re: chunking a long string? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-11-09 15:37 +0000
              Re: chunking a long string? Chris Angelico <rosuav@gmail.com> - 2013-11-10 09:14 +1100
                Re: chunking a long string? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-11-10 06:39 +0000
                Re: chunking a long string? Chris Angelico <rosuav@gmail.com> - 2013-11-10 19:46 +1100
        Re: chunking a long string? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-11-09 10:13 +0000
  Re: chunking a long string? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-11-09 00:54 +0000

csiph-web