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Groups > comp.lang.python > #22537

Re: Re: string interpolation for python

Date 2012-04-02 15:36 -0500
From Evan Driscoll <driscoll@cs.wisc.edu>
Subject Re: Re: string interpolation for python
References (6 earlier) <mailman.1205.1333358032.3037.python-list@python.org> <4f79938c$0$29981$c3e8da3$5496439d@news.astraweb.com> <mailman.1212.1333370596.3037.python-list@python.org> <jlc8b8$fu8$1@news.univ-fcomte.fr> <1333376732.8379.YahooMailNeo@web121502.mail.ne1.yahoo.com>
Newsgroups comp.lang.python
Message-ID <mailman.1232.1333398974.3037.python-list@python.org> (permalink)

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On 01/-10/-28163 01:59 PM, Yingjie Lan wrote:
> Because of the d"..." format, it won't
> affect old ways of doing things one bit.
> Allowing dynamic string wouldn't hurt
> a bit to anything that is already there.

Why don't you just write a function that does it? I think someone 
already suggested this...

   import dynamic_strings       # write this
   d = dynamic_strings.dynamic

   x = 5
   print(d("x=$x$"))

?

Sure, it's not *quite* as pretty as if you could just say d"x=$x$", and 
you might have to do some hacky uglyness in the implementation to get at 
the locals of the calling procedure, but it solves a bazillion problems, 
such as:

1. YOU can do it, instead of hoping it gets into the mainline
    interpreter

2. You can do it NOW, and it will work with "any" version of Python

3. You have the freedom to easily add "eval from *this dictionary* if
    you want, which solves Steven D'Aprano's objection that your
    suggestion is too weak.

4. Languages changes should be viewed suspiciously in general.

Evan

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Thread

Re: string interpolation for python Yingjie Lan <lanyjie@yahoo.com> - 2012-04-02 00:39 -0700
  Re: string interpolation for python Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2012-04-02 11:01 +0300
  Re: string interpolation for python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-04-02 08:26 +0000
    Re: string interpolation for python Chris Angelico <rosuav@gmail.com> - 2012-04-02 18:47 +1000
    Re: string interpolation for python Yingjie Lan <lanyjie@yahoo.com> - 2012-04-02 02:11 -0700
      Re: string interpolation for python Duncan Booth <duncan.booth@invalid.invalid> - 2012-04-02 10:19 +0000
      Re: string interpolation for python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-04-02 11:54 +0000
        Re: string interpolation for python Yingjie Lan <lanyjie@yahoo.com> - 2012-04-02 05:40 -0700
          Re: string interpolation for python Laurent Claessens <moky.math@gmail.com> - 2012-04-02 15:02 +0200
            Re: string interpolation for python Yingjie Lan <lanyjie@yahoo.com> - 2012-04-02 07:25 -0700
            Re: Re: string interpolation for python Evan Driscoll <driscoll@cs.wisc.edu> - 2012-04-02 15:36 -0500
          Re: string interpolation for python mwilson@the-wire.com - 2012-04-02 10:46 -0400
            Re: string interpolation for python mwilson@the-wire.com - 2012-04-02 11:34 -0400
              Re: string interpolation for python Yingjie Lan <lanyjie@yahoo.com> - 2012-04-02 09:02 -0700
      Re: string interpolation for python rusi <rustompmody@gmail.com> - 2012-04-02 06:04 -0700
    Re: string interpolation for python Yingjie Lan <lanyjie@yahoo.com> - 2012-04-02 02:17 -0700
      Re: string interpolation for python alex23 <wuwei23@gmail.com> - 2012-04-02 22:47 -0700
    Re: string interpolation for python Chris Angelico <rosuav@gmail.com> - 2012-04-02 19:56 +1000
    Re: string interpolation for python Chris Rebert <clp2@rebertia.com> - 2012-04-02 03:23 -0700
    Re: string interpolation for python Yingjie Lan <lanyjie@yahoo.com> - 2012-04-02 04:46 -0700
    Re: string interpolation for python Yingjie Lan <lanyjie@yahoo.com> - 2012-04-02 05:00 -0700
    Re: string interpolation for python Chris Angelico <rosuav@gmail.com> - 2012-04-03 00:58 +1000
      Re: string interpolation for python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-04-02 18:56 +0000
    Re: string interpolation for python Yingjie Lan <lanyjie@yahoo.com> - 2012-04-02 08:49 -0700
    Re: string interpolation for python Chris Angelico <rosuav@gmail.com> - 2012-04-03 08:38 +1000
      Re: string interpolation for python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-04-02 23:18 +0000
    Re: string interpolation for python Yingjie Lan <lanyjie@yahoo.com> - 2012-04-02 18:57 -0700

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