Here you see how one could use recursion together with generators for (inefficient) permutations generator. It is kind of interesting to know how one can do it recursively (of course there exist many ways).

Anyway this snippet demonstrates how you can use recursive generator call to feed a for statement. If you want usefull use of recursive generator, see my 11.11.11 11:11:11 Code Snippet post of full multiword anagram program.