"%(a)s ... %(b)s" % {'a': foo, 'b': '%(b)s'}

[Gerrit Holl]

Hello,

I'm facing the following problem. I set __version__ and now I set a string
like this:

MAIL = '''From: someone <%(email)s>
Subject: test

this is feedback.py %(version)
''' % {'version': __version__}

This raises a KeyError. I have to type:
... % {'version': __version__, 'email': '%(email)s'}

This is ugly! Isn't there a better way to fill in just SOME of the %(...)s
values in a string and leave the rest as is?

regards,
Gerrit.

-- 
"The move was on to 'Free the Lizard'"

  -- Jim Hamerly and Tom Paquin (Open Sources, 1999 O'Reilly and Associates)
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