Buffered streaming

[Ken Seehart]

I need to create a pipe where I have one thread (or maybe a generator) 
writing data to the tail while another python object is reading from the 
head.  This will run in real time, so the data must be deallocated after 
it is consumed.  Reading should block until data is written, and writing 
should block when the buffer is full (i.e. until some of the data is 
consumed).  I assume there must be a trivial way to do this, but I don't 
see it.  Any ideas or examples?

I'm using python 2.6.
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