From 94270a67f4b8b466f0be64da5007df6510835e2f Mon Sep 17 00:00:00 2001
From: KevinMidboe <kevin.midboe@gmail.com>
Date: Tue, 31 Jan 2017 21:42:54 +0100
Subject: [PATCH] Added better comments and cleaned up by making seperate
 converting functions and some small error handling.

---
 v1/diskusage.py | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/v1/diskusage.py b/v1/diskusage.py
index 337919f..e7d1005 100755
--- a/v1/diskusage.py
+++ b/v1/diskusage.py
@@ -3,10 +3,14 @@
 # @Author: KevinMidboe
 # @Date:   2017-01-28 10:54:06
 # @Last Modified by:   KevinMidboe
-# @Last Modified time: 2017-01-28 13:23:07
+# @Last Modified time: 2017-01-31 21:40:34
+
+# f_avail = free blocks avail to non sudo
+# frsize = fundamental file sys byte size
+# f_blocks = total number of blocks in the filesystem
 
 from os import statvfs
-	
+
 def sizeof(num, suffix='B'):
 	for unit in ['','K','M','G','T','P','E','Z']:
 		if abs(num) < 1024.0:
@@ -14,13 +18,18 @@ def sizeof(num, suffix='B'):
 		num /= 1024.0
 	return "%.1f%s%s" % (num, 'Y', suffix)
 
+# diskUsage uses statvfs to calculate disk size and availability for given disk
 def diskUsage(path='/'):
-	s = statvfs(path)
-	byteLeft = s.f_bavail * s.f_frsize
-	byteTotal = s.f_blocks * s.f_frsize
-	byteUsed = byteTotal-byteLeft
+	try:
+		s = statvfs(path)
+		byteLeft = s.f_bavail * s.f_frsize
+		byteTotal = s.f_blocks * s.f_frsize
+		byteUsed = byteTotal-byteLeft
 
-	return { 'left':sizeof(byteLeft), 'used':sizeof(byteUsed), 'total':sizeof(byteTotal) }
+		return { 'left':sizeof(byteLeft), 'used':sizeof(byteUsed), 'total':sizeof(byteTotal) }
+
+	except FileNotFoundError:
+		return None
 
 if __name__=="__main__":
 	n = diskUsage('/media/hdd1')