sync.py

#!/Library/Frameworks/Python.framework/Versions/2.7/bin/python

import sys
import os
import shutil
import time
from datetime import datetime
import argparse
import re

argParser = argparse.ArgumentParser(description='Script to process photos from source and move them to dest.')
argParser.add_argument('source', help='source directory - absolute path')
argParser.add_argument('dest', help='destination directory - absolute path')
args = argParser.parse_args()

#sourceDir = '/Users/[username]/Dropbox/Camera Uploads/'
sourceDir = args.source
match = re.search(r'^.*/$', sourceDir)
if not match:
    sourceDir += str("/")

#destDir = '/Users/[username]/Pictures/Photos/'
destDir = args.dest
match = re.search(r'^.*/$', destDir)
if not match:
    destDir += str("/")

if not os.path.isdir(sourceDir):
  print 'Can\'t find source directory: ' + sourceDir
  sys.exit(1)
if not os.path.isdir(destDir):
  print 'Can\'t find destination directory: ' + destDir
  sys.exit(1)

error_files = []

for root, subFolders, files in os.walk(sourceDir):
  for photo_file in files:
    try:
      if photo_file.endswith(".jpg") or photo_file.endswith(".jpeg") or photo_file.endswith(".png") or photo_file.endswith(".gif"):
        photoPath = os.path.join(root, photo_file)
        photo_date = datetime.fromtimestamp(os.path.getmtime(photoPath))

        #if no directory exists for photo_date, create it
        new_photo_dir = os.path.join(destDir, photo_date.strftime("%Y-%m"))
        if not os.path.exists(new_photo_dir) and not os.path.isdir(new_photo_dir):
          os.mkdir(new_photo_dir)

        shutil.copy2(photoPath, new_photo_dir)
        os.remove(photoPath)
    except Exception:
      error_files.append(photoPath)

for error_file in error_files:
  print error_file

Updated to require that source and dest directories are command line arguments. Note that these must be absolute paths. The source directory can now also contain subfolders, and all files in all subfolders will be processed by the script.