#!/usr/bin/env python

#-*- coding:utf8 -*-

# Copyright 2007 Doug Hellmann.

#

#

# All Rights Reserved

#

# Permission to use, copy, modify, and distribute this software and

# its documentation for any purpose and without fee is hereby

# granted, provided that the above copyright notice appear in all

# copies and that both that copyright notice and this permission

# notice appear in supporting documentation, and that the name of Doug

# Hellmann not be used in advertising or publicity pertaining to

# distribution of the software without specific, written prior

# permission.

#

# DOUG HELLMANN DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,

# INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN

# NO EVENT SHALL DOUG HELLMANN BE LIABLE FOR ANY SPECIAL, INDIRECT OR

# CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS

# OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,

# NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN

# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

#

"""More interaction between child processes.

"""

__module_id__ = "$Id$"

#end_pymotw_header

import subprocess

print 'One line at a time:'

proc = subprocess.Popen('python repeater.py',

shell=True,

stdin=subprocess.PIPE,

stdout=subprocess.PIPE,

)

for i in range(5):

proc.stdin.write('%d\n' % i)

output = proc.stdout.readline()

print output.rstrip()

remainder = proc.communicate()[0]

print remainder

print

print 'All output at once:'

proc = subprocess.Popen('python repeater.py',

shell=True,

stdin=subprocess.PIPE,

stdout=subprocess.PIPE,

)

for i in range(5):

proc.stdin.write('%d\n' % i)

output = proc.communicate()[0]

print output