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Groups > comp.lang.python > #2599

Re: proposal to allow to set the delimiter in str.format to something other than curly bracket

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Peter Otten wrote:

> You could automatically convert from a custom format like that in your
> original post...

<snip>

Here's a class wrapping your functionality:

import re

class Template(object):
    '''uses double brackets e.g [[ob.attr]] as delims to get
      around curly bracket ({}) collisions when generating code
    '''
    _pattern = re.compile(r"\[\[|]]|\{|\}")
    _lookup = {
        "[[": "{",
        "]]": "}",
        "{": "{{",
        "}": "}}",
    }
    def __init__(self, txt):
        self.txt = txt
        self.type = type

    def _substitute(self, m):
        return self._lookup[m.group()]

    def render(self, *args, **kwds):
        return self._pattern.sub(
            self._substitute, self.txt).format(*args, **kwds)

def test_Template():
    class P: pass
    p = P()
    p.name = 'peter'
    txt = 'hello there [[o.name]]'
    t = Template(txt)
    assert t.render(o=p) == 'hello there peter'

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proposal to allow to set the delimiter in str.format to something other than curly bracket Alia Khouri <alia_khouri@yahoo.com> - 2011-04-03 03:07 -0700
  Re: proposal to allow to set the delimiter in str.format to something other than curly bracket Corey Richardson <kb1pkl@aim.com> - 2011-04-03 06:53 -0400
    Re: proposal to allow to set the delimiter in str.format to something other than curly bracket Alia Khouri <alia_khouri@yahoo.com> - 2011-04-03 05:17 -0700
  Re: proposal to allow to set the delimiter in str.format to something other than curly bracket Terry Reedy <tjreedy@udel.edu> - 2011-04-04 01:17 -0400
    Re: proposal to allow to set the delimiter in str.format to something other than curly bracket Alia Khouri <alia_khouri@yahoo.com> - 2011-04-04 08:42 -0700
      Re: proposal to allow to set the delimiter in str.format to something other than curly bracket Peter Otten <__peter__@web.de> - 2011-04-04 18:18 +0200
        Re: proposal to allow to set the delimiter in str.format to something other than curly bracket Alia Khouri <alia_khouri@yahoo.com> - 2011-04-04 13:45 -0700
          Re: proposal to allow to set the delimiter in str.format to something other than curly bracket Neil Cerutti <neilc@norwich.edu> - 2011-04-05 13:45 +0000
        Re: proposal to allow to set the delimiter in str.format to something other than curly bracket Alia Khouri <alia_khouri@yahoo.com> - 2011-04-04 14:32 -0700

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