os.popen on windows: loosing stdout of child process

[Greg Ercolano]

	When I use os.popen(cmd,'w'), I find that under windows, the stdout
	of the child process disappears, instead of appearing in the DOS window
	the script is invoked from. eg:

C:\> type foo.py
import os
import sys
file = os.popen("nslookup", 'w')
file.write("google.com\n")
file.close()

C:\> python foo.py
			<-- nothing is printed
C:\>

	This just seems wrong. The following DOS equivalent works fine:

C:\> echo google.com | nslookup
Default Server:  dns.erco.x
Address:  192.168.1.14
[..expected output..]

	When I run the same python program on a unix box, the output
	from 'nslookup' appears in the terminal, as I'd expect.

	Shouldn't popen() be consistent in its handling of the child's
	stdout and stderr across platforms?

	Maybe I'm missing something, being somewhat new to python, but
	an old hand at unix and win32 and functions like popen(). Didn't
	see anything in the docs for popen(), and I googled around quite
	a bit on the web and groups for eg. 'python windows popen stdout lost'
	and found nothing useful.

	FWIW, I'm using the windows version of python 2.5 from activestate.