Best way to use globally format

From	Cecil Westerhof <Cecil@decebal.nl>
Newsgroups	comp.lang.python
Subject	Best way to use globally format
Date	2015-05-03 17:21 +0200
Organization	Decebal Computing
Message-ID	<87wq0pk7pf.fsf@Equus.decebal.nl> (permalink)

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I have a file where I used a lot of {0}, {1} and {2}. Most but not all
are changed to {0:.3E}, {1:.3E} and {2:.3E}. But when I want to change
the format I come in dependency hell.

I could do something like:
    format = ':.3E'
    fmt0   = '{0' + format + '}
    fmt1   = '{1' + format + '}
    fmt2   = '{2' + format + '}

and replace occurrences of:
    'before {0} after'
with:
    'before ' + fmt0 + ' after'

But that does not really make me happy. Is there a better way?

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

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Best way to use globally format Cecil Westerhof <Cecil@decebal.nl> - 2015-05-03 17:21 +0200
  Re: Best way to use globally format Peter Otten <__peter__@web.de> - 2015-05-03 18:16 +0200
  Re: Best way to use globally format Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-03 17:32 +0100

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