ignoring some placeholders in string formatting

[Steven D'Aprano]

On Thu, 11 Feb 2010 14:25:10 +1300, Michal Ludvig wrote:

> Hi all,
> 
> when I've got a string, say:
> 
> URL="http://xyz/blah?session=%(session)s&message=%(message)s"
> 
> is it possible to fill in only 'session' and leave "%(message)s" as is
> when it isn't present in the values dict?

No, but instead see string templates:

http://docs.python.org/library/string.html#template-strings



-- 
Steven