mycmp.py

import os
import sys
import filecmp


class MyDirCmp(filecmp.dircmp):
    def phase3(self): # Find out differences between common files
        xx = filecmp.cmpfiles(self.left, self.right, self.common_files, shallow=False)
        self.same_files, self.diff_files, self.funny_files = xx	



class FileDescriptor(object):
	def __init__(self, file1=None, file2=None):
		self.file1 = file1
		self.file2 = file2

def get_files_recursive(d):
	result = []
	for dirpath, dirnames, filenames in os.walk(d):
		for f in filenames:
			fullpath = os.path.join(dirpath, f)
			result.append(fullpath)
	return result			

left_files = get_files_recursive(dir1)
right_files = get_files_recursive(dir2)

left_only = []
identical = []
for f_left in left_files:
	file_found = False
	for f_right in right_files:
		if filecmp.cmp(f_left, f_right, shallow=False):
			identical.append(FileDescriptor(f_left, f_right))
			file_found = True
		filecmp.clear_cache()
	if not file_found:
		left_only.append(f_left)