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Re: raw format string in string format method?

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Helmut Jarausch wrote:

> I'd like to print a string with the string format method which uses
> {0}, ...
> 
> Unfortunately, the string contains TeX commands which use lots of
> braces. Therefore I would have to double all these braces just for the
> format method which makes the string hardly readable.
> 
> Is there anything like a "raw" format string and any other means
> to circumvent this?
> 
> Many thanks for a hint,
> Helmut.

While percent-formatting is probably the way to go here is a hack to replace 
the braces with custom characters:

import string

class SwapFormatter(string.Formatter):
    custom = "<>"
    braces = "{}"
    swap = {ord(p): q for p, q in zip(custom + braces, braces + custom)}

    def format(self, format_string, *args, **kw):
        format_string = format_string.translate(self.swap)
        return super().format(format_string, *args, **kw)

    def parse(self, format_string):
        return ((t[0].translate(self.swap),) + t[1:]
                for t in super().parse(format_string))

myformat = SwapFormatter().format
print(myformat("<< {} {{<0>}} <2> {<foo>} <1:<width>> >>",
               "alpha", 42, "gamma", foo="delta", width=5))

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Thread

raw format string in string format method? Helmut Jarausch <jarausch@skynet.be> - 2013-02-28 14:11 +0000
  Re: raw format string in string format method? Chris Angelico <rosuav@gmail.com> - 2013-03-01 01:22 +1100
    Re: raw format string in string format method? Helmut Jarausch <jarausch@skynet.be> - 2013-02-28 14:42 +0000
      Re: raw format string in string format method? Chris Angelico <rosuav@gmail.com> - 2013-03-01 02:09 +1100
      Re: raw format string in string format method? Rick Johnson <rantingrickjohnson@gmail.com> - 2013-02-28 15:27 -0800
        Re: raw format string in string format method? Chris Angelico <rosuav@gmail.com> - 2013-03-01 15:29 +1100
      Re: raw format string in string format method? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-03-01 00:00 +0000
  Re: raw format string in string format method? Peter Otten <__peter__@web.de> - 2013-02-28 16:41 +0100
  Re: raw format string in string format method? Rick Johnson <rantingrickjohnson@gmail.com> - 2013-02-28 15:06 -0800

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