This will scan the current directory and all subdirectories and display the size.

Author: geekcomputers

folder_size.py

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+# Script Name		: folder_size.py
+# Author				: Craig Richards
+# Created				: 19th July 2012
+# Last Modified		: 
+# Version				: 1.0
+
+# Modifications		: 
+
+# Description			: This will scan the current directory and all subdirectories and display the size.
+
+import os 														# Load the library module
+
+directory = '.'													# Set the variable directory to be the current directory
+dir_size = 0													# Set the size to 0
+for (path, dirs, files) in os.walk(directory):			# Walk through all the directories
+  for file in files:												# Get all the files
+    filename = os.path.join(path, file)
+    dir_size += os.path.getsize(filename)			# Get the sizes, the following lines print the sizes in bytes, Kb, Mb and Gb
+print "Folder Size in Bytes = %0.2f Bytes" % (dir_size)
+print "Folder Size in Kilobytes = %0.2f KB" % (dir_size/1024.0)
+print "Folder Size in Megabytes = %0.2f MB" % (dir_size/1024/1024.0)
+print "Folder Size in Gigabytes = %0.2f GB" % (dir_size/1024/1024/1024.0)