Duplex communication with pipes - is possible ?

[Dara Durum]

Hi !

Ahhh !

It's working !

This is the simple client code:
if 'C' in sys.argv:
   #sys.stdout=open(r'c:\tpp2client.log','w')
   print "clt start"
   while 1:
       head=sys.stdin.read(4)
       print "clt head",[head]
       if head.lower()=='quit':
           break
       dsize=int(head)
       if dsize:
           data=sys.stdin.read(dsize)
           print "clt get data"#,[data]
   print "clt end\n"
And the master:
else:
   print "MS"
   p=subprocess.Popen([r'c:\python24\python.exe','tpp2.py','C'], \
       stdin=subprocess.PIPE,stdout=subprocess.PIPE)
   print "MSS"
   (child_stdout, child_stdin) = (p.stdout, p.stdin)
   data=range(1000)
   import cPickle
   bdata=cPickle.dumps(data,1)
   print len(bdata)
   import binascii
   hdata=binascii.hexlify(bdata)
   print len(hdata)
   import base64
   hdata=base64.encodestring(bdata)
   print len(hdata)
   child_stdin.write('%04d'%len(hdata))
   child_stdin.write(hdata)
   child_stdin.write('quit')
   #child_stdin.write('quit')
   #child_stdin.write('quit\n')
   output=child_stdout.readlines()
   print [output]
   print "MEE"

Now I trying with packet size decreasing. Are PIPE-s can handle the
binary data packets, or I need to convert them with base64 ?

Thanks for your help:
dd