Running python 2.3.4, on Windows XP the popen2 docs show
6.8 popen2 -- Subprocesses with accessible I/O streams This module allows you to spawn processes and connect to their input/output/error pipes and >>obtain their return codes under Unix and Windows.<< Then it further goes to say The only way to retrieve the return codes for the child processes is by using the poll() or wait() methods on the Popen3 and Popen4 classes; these are
only available on Unix<<.
This information is not available when using the popen2(), popen3(), and popen4() functions, or the equivalent functions in the os <module-os.html>module. After having spent much time reading about the differences between the popen calls in the os module, and the popen calls in popen2, if the return values aren't available under windows, I'm confused. Why bother making these functions available under Windows at all? Other than the order of the return values, I don't see any advantage of one over the other. Since the document contradicts itself regaring the return values on Windows, is there a way to get the return values or not? Is so- how? Since poll and wait are only available on Unix, how do we wait for a process to finish under Windows? thanks
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