python sys.stdout and C++ iostreams::cout

[Utpal Sarkar]

Thanks a lot Chris and Nobody! I'll have a look at dup2 for a start.

> > I was assuming that sys.stdout would be referencing the same physical stream as iostreams::cout running in the same process, but this doesn't seem to be the case.
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> 
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> That's more-or-less true, but there will likely be separate buffering,
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> so even without redirection you might see some oddities. But the
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> problem with your code is that you're not actually redirecting stdout
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> in any way; you're catching, at a fairly high level, everything that
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> Python would otherwise have sent there.
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> Is there any way that you can get the C++ code to offer a way to
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> redirect its output? Otherwise, you're going to have to fiddle around
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> with the usual mess of I/O redirection (with dup2), and you can only
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> send it to what the OS sees as a file (so, no StringIO buffer). So to
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> achieve your goal, you may need either a temporary physical file, or
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> some sort of pipe (and worry about reading from it before it fills up,
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> etc, etc). There may be alternatives, but in any case, the easiest way
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> is going to be with some assistance from the C++ function.
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> ChrisA