why does popen2 silently ignore IOError?

[David Bolen]

"Donn Cave" <donn at u.washington.edu> writes:

> popen is actually a bit better than popen2 here, though, inasmuch as when
> you close the file object you get a special return value with the exit
> status.  To get this value with popen2, you need to use the Popen3 class
> and call its wait() member function.

Or on Windows, which doesn't have the Popen3/4 classes, you get the
exit status on close for any of the os.popen# calls (in Python 2.0 or
greater since before that only os.popen was in the standard library
for Windows).  For the popen2-popen4 calls, the exit code is retrieved
when you close the final file from the set returned by the initial
popen# call.

--
-- David
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