"Stringizing" a list

[Cees de Groot]

I'm sure I've seen a place with a snippet for this, but I couldn't find it:

what's the cleanest way to convert a random nested list structure like:

['foo', ['bar', 'baz'], 'quux']

into:

'foo bar baz quux' ?

I've, ahem, solved this with a bit of recursion and relying on '+' to throw
in certain circumstances, but it's a hairy and ugly piece of code. 

-- 
Cees de Groot               http://www.cdegroot.com     <cg at cdegroot.com>
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