code: def get_disk_space(start_path='.'):
      
      total_size = 0
      for root, dname_list, fname_list in os.walk(start_path):
          for fname in fname_list:
              fpath = os.path.join(root, fname)
              try:
                  total_size += os.path.getsize(fpath)
              except OSError:
                  pass
      return total_size
docs: References:
          http://stackoverflow.com/questions/1392413/calculating-a-directory-size-using-python