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1. Use named pipes

   #!/usr/bin/python
   
   from subprocess import *
   import os
   
   FIFO_PATH = '/tmp/my_fifo'
   
   if os.path.exists(FIFO_PATH):
       os.unlink(FIFO_PATH)
   
   if not os.path.exists(FIFO_PATH):
       os.mkfifo(FIFO_PATH)
       my_fifo = open(FIFO_PATH, 'w+')
       print "my_fifo:", my_fifo
   
   pipe = Popen('/bin/date', shell=False, stdin=PIPE, stdout=my_fifo, stderr=PIPE)
   
   print open(FIFO_PATH, 'r').readline()
   
   os.unlink(FIFO_PATH)