How to do os.popen with write and read at the same time?

[Benyang Tang]

One of the readers kindly suggested using popen2. I got it working. Here is the code:

#!/usr/bin/env python
import os, popen2

execFile = 'a.out'
dataFile = 'dataIn\n'
iCol = 1 
  
out1,in1 = popen2.popen2(execFile)
print out1, in1
  
in1.write(dataFile)
in1.write(str(iCol)+'\n')
in1.close() # in1 has to be closed before execFile runs?
  
a = out1.read() 
out1.close()
  
print a
#===============================================

Benyang Tang wrote:
> 
> I like to do thing like:
> 
> stdin > grep 'something' >stdout
> 
> How do I access stdin and stdout in python?
> os.popen accepts either 'w' or 'r' mode, but not both at the same time.

-- 
<> Benyang Tang                                   office: 818/354-0327 <> 
<> 300-323, JPL                                      fax: 818/393-6720 <> 
<> 4800 Oak Grove Drive               mail: btang at pacific.jpl.nasa.gov <> 
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