cp_photos.py

#!/usr/bin/env python

import os
import os.path
import shutil
import sys

def main():

    GOOGLE_DRIVE_DIR = "/Users/michael/Google Drive/Altitude Iowa Vids/"
    TARGET_DIR = "/Users/michael/Pictures/Altitude Iowa/"

    if not GOOGLE_DRIVE_DIR.endswith("/"):
        GOOGLE_DRIVE_DIR = GOOGLE_DRIVE_DIR + "/"

    if not TARGET_DIR.endswith("/"):
        TARGET_DIR = TARGET_DIR + "/"

    for dirpath, dirnames, filenames in os.walk(GOOGLE_DRIVE_DIR):
        for filename in [f for f in filenames if f.lower().endswith(".dng")]:
            if not dirpath.startswith(GOOGLE_DRIVE_DIR):
                raise ValueError("Directory is not in the Google Drive directory.")

            partial_dir = dirpath[len(GOOGLE_DRIVE_DIR):]

            google_file = os.path.join(GOOGLE_DRIVE_DIR, partial_dir, filename)
            target_file = os.path.join(TARGET_DIR, partial_dir, filename)

            if not os.path.exists(target_file):
                os.makedirs(os.path.join(TARGET_DIR, partial_dir))

            if not os.path.isfile(target_file):
                shutil.copy(google_file, target_file)

if __name__ == "__main__":
    main()