String formatting with two dictionaries?

[Wolfgang Grafen]

Carsten Gaebler wrote:
> 
> Hi there!
> 
> Given a string
> 
> s = "%(foo)s %(spam)s"
> 
> and two dictionaries
> 
> d1 = {"foo": "bar"}
> d2 = {"spam": "eggs"}
> 
> how would you apply d1 and d2 to s without modifying or explicitly
> copying one of the dicts? I mean, I don't like to
> 
> d3 = dictionary(d1)
> d3.update(d2)
> s = s % d3
> 
> cg.
foo  = d1["foo"]
spam = d2["spam"]

s = s % vars()

:) wolfgang