From c2a6d675f1c2aae959eb1583665bc6baab45b9a3 Mon Sep 17 00:00:00 2001
From: Tom Vincent <thomasleevincent@hsbc.com.hk>
Date: Wed, 27 Apr 2011 17:10:06 +0800
Subject: [PATCH] Comment valid char array

---
 sanitise.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sanitise.py b/sanitise.py
index 21d0244..de1b748 100755
--- a/sanitise.py
+++ b/sanitise.py
@@ -40,8 +40,10 @@ def sanitise(str):
     str = removeAccents(str)
     str = regex(str)
 
+    # Permit only letters, digits, dash (seperator) and dot (file extension)
     valid = string.ascii_letters + string.digits + "-."
     str = "".join([chr for chr in str if chr in valid])
+
     return str.lower()
 
 def parseArguments():