http://code.activestate.com/recipes/tags/concurrency_model/new/2009-12-03T23:08:38-08:00ActiveState Code Recipes2009-12-03T23:08:38-08:00Raymond Hettingerhttp://code.activestate.com/recipes/users/178123/http://code.activestate.com/recipes/576961-technique-for-cyclical-iteration/

<p style="color: grey"> Python recipe 576961 by <a href="/recipes/users/178123/">Raymond Hettinger</a> (<a href="/recipes/tags/concurrency_model/">concurrency_model</a>, <a href="/recipes/tags/cyclic_iterator/">cyclic_iterator</a>). Revision 7. </p> <p>Solution to the Hamming Number problem. Demonstrates a lazy evaluation evaluation technique using itertools.tee() to feed an iterator into itself. This is a common technique with Haskell. The deferred_output() function is the key technique for implementing a forward reference to the output of the stream.</p>