Re: %%(%s)s mean in python

From	Thomas Rachel <nutznetz-0c1b6768-bfa9-48d5-a470-7603bd3aa915@spamschutz.glglgl.de>
Newsgroups	comp.lang.python
Subject	Re: %%(%s)s mean in python
Date	2014-10-29 16:12 +0100
Organization	A not so newly installed InterNetNews server
Message-ID	<m2r05g$5hm$1@r01.glglgl.de> (permalink)
References	<76c6409c-5289-4cf2-b80a-6349325356c6@googlegroups.com>

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Am 29.10.2014 07:02 schrieb satishmlmlml@gmail.com:

> What does %%(%s)s mean in Python?

Weird question, as this has nothing to do with the code you just posted.

In general, what comes up to my mind, is that it is a format string to 
build another format string.

Example:

metafmt = '%%(%s)s'
fieldname = 'myfield'
fmt = metafmt % fieldname
# Now we have a fmt as if it was assigned with '%(myfield)s':
# %% -> %, %s -> myfield.

d = {fieldname: 'my content'}

print fmt % d
# this now prints the given field - which is noted in fieldname -
# from the given dict d.

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%%(%s)s mean in python satishmlmlml@gmail.com - 2014-10-28 23:02 -0700
  Re: %%(%s)s mean in python satishmlmlml@gmail.com - 2014-10-28 23:12 -0700
  Re: %%(%s)s mean in python Ned Batchelder <ned@nedbatchelder.com> - 2014-10-29 07:38 -0400
  Re: %%(%s)s mean in python Thomas Rachel <nutznetz-0c1b6768-bfa9-48d5-a470-7603bd3aa915@spamschutz.glglgl.de> - 2014-10-29 16:12 +0100

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