#!/usr/bin/python

# dirsize.py - calculate the total size of files, including hidden ones,
# in a directory that is specified on the command line, e.g.
# python dirsize.py /home/jdoe/test. 

# Vesion: 1.0
# Created: 2016-03-28
# Last modified: 2016-03-28

import os, sys

# Provide the directory for which you wish to perform the calculation as
# an argument on the command line.

dirSize = 0
theDir = os.listdir( sys.argv[1] )

for file in theDir:
   full_path_to_file = sys.argv[1] +  "/" + file
   dirSize = dirSize + os.path.getsize(full_path_to_file)
print dirSize