added comments to df_check.py

df_check.py

@@ -2,21 +2,25 @@
 
 import os
 
-
+# given paths(mountpoints)
 path=("/boot", "/", "/home/")
 
+#output head
 print "mountpoints\tfree megabytes"
 print "------------------------------"
+
+#work path tuple
 for mountpoint in path:
+    #check if given path is a mountpoint
     if os.path.ismount(mountpoint):
+        #create statvfs object
         fs = os.statvfs(mountpoint)
+        #calculate free megabytes
         freembytes = fs.f_bavail * fs.f_bsize / 1024**2.0
+        #output
         print "%s\t\t%.1f MB" %(mountpoint, freembytes)
     else:
         print "error: given path is not a mountpoint"
 
 
-
-
-
 # end of file