Added some more comments.
diff --git a/Lib/statvfs.py b/Lib/statvfs.py
index 79610b6..fdf0451 100644
--- a/Lib/statvfs.py
+++ b/Lib/statvfs.py
@@ -3,18 +3,20 @@
# Defines constants for interpreting statvfs struct as returned
# by os.statvfs() and os.fstatvfs() (if they exist).
#
+# Suggested usage: from statvfs import *
+#
-# Indices for statvfs struct members in tuple returned by
-# os.statvfs() and os.fstatvfs()
+# Indices for statvfs struct members in the tuple returned by
+# os.statvfs() and os.fstatvfs().
-F_BSIZE = 0
-F_FRSIZE = 1
-F_BLOCKS = 2
-F_BFREE = 3
-F_BAVAIL = 4
-F_FILES = 5
-F_FFREE = 6
-F_FAVAIL = 7
-F_FSID = 8
-F_FLAG = 9
-F_NAMEMAX = 10
+F_BSIZE = 0 # Preferred file system block size
+F_FRSIZE = 1 # Fundamental file system block size
+F_BLOCKS = 2 # Total number of file system blocks (FRSIZE)
+F_BFREE = 3 # Total number of free blocks
+F_BAVAIL = 4 # Free blocks available to non-superuser
+F_FILES = 5 # Total number of file nodes
+F_FFREE = 6 # Total number of free file nodes
+F_FAVAIL = 7 # Free nodes available to non-superuser
+F_FSID = 8 # File system ID (meaning is system dependent)
+F_FLAG = 9 # Flags (see your local statvfs man page)
+F_NAMEMAX = 10 # Maximum file name length