old_contents: #! /usr/env/python
  import os
  import hashlib
  import sys
  
  bufsize = 65536
  # Path1 = '/Users/kirkchambers/Desktop'
  # Path2 = '/Users/kirkchambers/DataSets'
  
  def generate_file_digests_for(path):
  	path_set = set()
  	for item in os.walk(path):
  		(directory, _subdirectories, files) = item
  		for file in files:
  			if (file[0] == '.'):
  				continue
  			else:
  				fqFilename = os.path.join(directory, file)
  				path_set.add(generate_file_digest(fqFilename, file))
  	return path_set
  
  
  def generate_file_digest(fqFilename, shortFilename):
  	hasher = hashlib.md5()
  	with open(fqFilename, 'rb') as filestream:
  		fileBuffer = filestream.read(bufsize)
  		while len(fileBuffer) > 0:
  			hasher.update(fileBuffer)
  			fileBuffer = filestream.read(bufsize)
  	# return "Filename:{file}\nHash:{hash}\nSize:{size}\n".format(file=fqFilename, hash=hasher.hexdigest(), size=os.path.getsize(fqFilename))
  	return (hasher.hexdigest(), fqFilename, os.path.getsize(fqFilename))
  
  
  def usage():
  	print "file_list.py directory1 directory2"
  	print "Prints out the files present in directory1 which are NOT present in directory2"
  
  
  if __name__ == "__main__":
  	try:
  		(_command, Path1, Path2) = sys.argv
  	except:
  		usage()
  		exit(1)
  
  	path_set_1 = generate_file_digests_for(Path1)
  	path_set_2 = generate_file_digests_for(Path2)
  
  	# union = path_set_1 | path_set_2
  	set_1_exclusives = path_set_1 - path_set_2
  	# set_2_exclusives = path_set_2 - path_set_1
  	# print "length of 1: {}".format(len(path_set_1))
  	# print "length of 2: {}".format(len(path_set_2))
  	# print "length of union: {}".format(len(union))
  	# print "length of set1 uniqs: {}".format(len(set_1_exclusives))
  	# print "length of set2 uniqs: {}".format(len(set_2_exclusives))
  
  	print "Files present in {path1} and not in {path2}:".format(path1=Path1, path2=Path2)
  	for item in set_1_exclusives:
  		print item[1]
new_contents: #! /usr/env/python
  import os
  import hashlib
  import sys
  
  bufsize = 65536
  
  def generate_file_digests_for(path):
  	path_set = set()
  	for item in os.walk(path):
  		(directory, _subdirectories, files) = item
  		for file in files:
  			if (file[0] == '.'):
  				continue
  			else:
  				fqFilename = os.path.join(directory, file)
  				path_set.add(generate_file_digest(fqFilename, file))
  	return path_set
  
  
  def generate_file_digest(fqFilename, shortFilename):
  	hasher = hashlib.md5()
  	with open(fqFilename, 'rb') as filestream:
  		fileBuffer = filestream.read(bufsize)
  		while len(fileBuffer) > 0:
  			hasher.update(fileBuffer)
  			fileBuffer = filestream.read(bufsize)
  	return (hasher.hexdigest(), fqFilename, os.path.getsize(fqFilename))
  
  
  def usage():
  	print "file_list.py directory1 directory2"
  	print "Prints out the files present in directory1 which are NOT present in directory2"
  
  
  if __name__ == "__main__":
  	try:
  		(_command, Path1, Path2) = sys.argv
  	except:
  		usage()
  		exit(1)
  
  	path_set_1 = generate_file_digests_for(Path1)
  	path_set_2 = generate_file_digests_for(Path2)
  	set_1_exclusives = path_set_1 - path_set_2
  
  	print "Files present in {path1} and not in {path2}:".format(path1=Path1, path2=Path2)
  	for item in set_1_exclusives:
  		print item[1]
subject: clean up comments