I've read your code. May the main problem locates at "cmd". Assume that foo.py and listen.py are at the same directory. It should look like:
cmd='python listen.py'
or if you included '#!/usr/bin/python' (Linux) or '#!/usr/local/bin/python' (FreeBSD) as the first line in listen.py and you changed mode of listen.py to a+x
cmd='./listen.py'
or even if you are now in some one of PATH
cmd='listen.py
Maybe it hits the point. Just maybe, because you didn't give your output. Here is an example code, it really works at least. -----------foo.py-------------- import popen2
cmd='python listen.py'
(pout,pin)=popen2.popen2(cmd)
pin.write('Here is a message from pipe.')
pin.close()
got=pout.readlines()
pout.close()
print '\n'.join(got)---------listen.py-----------
try:
uh=raw_input("Write this through pipe: ")
#Write this to stdin, so uh should have message
except EOFError:
print 'No message.'
else:
print uh
----------------------------------Juan Shen
ktpr wrote:
Hi all,
I am trying to supply input to another program using
pipes. I can read from it just fine, but writing to
its stdin doesn't seem to be working.
foo.py (gets pipe to listen.py) --- from popen2 import popen2
cmd = "listen.py"
#stdout, stdin r, w = popen2(cmd)
w.write("Message sent")
w.close()
got = r.readlines() r.close()
for line in got: print line
--- listen.py --- import sys
# wrote to this stdin, so uh should have message uh = raw_input("why doesn't it")
if "" != uh: print "go here?"
if "" == uh: print "or even here?"
---
I know I'm missing something conceptual...
I only get "why doesn't it" printed to the screen and the message didn't seem to transfer across the pipe, as listen.py aborted before the if statement somehow. Any and all help would be appreciated; popen2._test() works fine ...
cheers ktpr
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