That's not the tee that I'm talking about.

This takes one iterator and returns n multiple iterators:

http://docs.python.org/library/itertools.html#itertools.tee

This is what I'm talking about when I'm talking about tee:

http://linux.die.net/man/1/tee

Python has a reverse tee:

http://docs.python.org/library/fileinput.html

This iterates over input from multiple sources, but my implementation takes input from a single source and writes it to multiple destinations.