add subprocess sample

michaelliao · michaelliao · commit 475fd336bda2 · 2015-04-04T20:45:53.000+08:00
diff --git a/py3/multitask/do_subprocess.py b/py3/multitask/do_subprocess.py
@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import subprocess
+
+print('$ nslookup www.python.org')
+r = subprocess.call(['nslookup', 'www.python.org'])
+print('Exit code:', r)
+
+print('$ nslookup')
+p = subprocess.Popen(['nslookup'], stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+output, err = p.communicate(b'set q=mx\npython.org\nexit\n')
+print(output.decode('utf-8'))
+print('Exit code:', p.returncode)
