Python - converting a list of tuples to a list of strings

Question

I have a list of tuples that looks like this:

[('this', 'is'), ('is', 'the'), ('the', 'first'), ('first', 'document'), ('document', '.')]

What is the most pythonic and efficient way to convert into this where each token is separated by a space:

['this is', 'is the', 'the first', 'first document', 'document .']

Answer 1

Very simple:

[ "%s %s" % x for x in l ]