add hello module

Author: michaelliao

samples/module/hello.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+' a test module '
+
+__author__ = 'Michael Liao'
+
+import sys
+
+def test():
+    args = sys.argv
+    if len(args)==1:
+            print('Hello, world!')
+    elif len(args)==2:
+        print('Hello, %s!' % args[1])
+    else:
+        print('Too many arguments!')
+
+if __name__=='__main__':
+    test()
+