Read handle concatenation

kj at
Thu Nov 5 16:24:02 CET 2009

I want to be able to take two or more open read handles and
concatenate them into an object that behaves like a regular read
handle (i.e. a file object open for reading), but behind the scenes
it reads from the concatenated handles in sequence.  I.e. I want
the read-handle equivalent of the standard Unix utility cat.  (The
reason I can't use subprocess and cat for this is that I want to
concatenate read handles that do not necessarily come from files.)

The only way I know to do this from scratch is straightforward but
tedious, so I thought I'd better ask to see if there's already some
module that would facilitate this task.



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