[issue9939] Add a pipe type (FIFO) to the io module

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> > Simply buffer everything.
> 
> That works for when a write operation would block.  What would it do
> when a read operation would block?

Good question. It could either return an empty bytes object, or perhaps
raise EOFError (it could be a constructor argument).

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<http://bugs.python.org/issue9939>
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