rename_by_date_taken.py

#!/usr/bin/python

import PIL
from PIL import Image, ExifTags
import argparse
import os
import shutil
import subprocess

exifcmd = "/usr/local/bin/exiftool"

def main(args):
    for full_path in args.filenames:
        path, fn = os.path.split(full_path)
        img = Image.open(full_path)
        img_exif = img.getexif()

        if img_exif is None:
            print("Sorry, image has no exif data.")
        else:
            img_exif_dict = dict(img_exif)
            for key, date_taken in img_exif_dict.items():
                if key in ExifTags.TAGS:
                    if (ExifTags.TAGS[key] == 'DateTime'):

                        head, tail = os.path.split(full_path)
                        filename, file_extension = os.path.splitext(full_path)
                
                        date_parts = date_taken.split()
                        day = date_parts[-2]
                        hour = date_parts[-1]

                        if hour.startswith("24"):
                            hour = "00" + hour[2:]

                        new_filename = day + "_" + hour + file_extension
                        new_filename = new_filename.replace(":", "-").replace(" ", "_")
                        new_path = os.path.join(head, new_filename)

                        # Checks that there is not a file already.
                        while os.path.exists(new_path):
                            pieces = new_path.split(".")
                            pieces[-2] += '_b'
                            new_path = ".".join(pieces)

                        print("Renaming: %s -> %s" % (full_path, new_path))
                        shutil.move(full_path, new_path)
                        
                        # Done for this file
                        break

if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument('filenames', type=str, default=None,
                        nargs="*", help="Files to rename")
    args = parser.parse_args()
    main(args)