Rename pictures with date and time.

batch_pic_rename.py

import os
import sys
import glob
#from PIL import Image
#from PIL.ExifTags import TAGS
import time  


def get_exif(file_name):
    """ Extracts EXIF data. Does not check for file validity. """
    ret = {}
    i = Image.open(file_name)
    info = i._getexif()
    for tag, value in info.items():
        decoded = TAGS.get(tag, tag)
        ret[decoded] = value
    return ret


def format_date_time(exif):
    date_time = exif["DateTimeOriginal"]
    date_time = date_time.replace(":", ".")
    date_time = date_time.replace(" ", "-")
    return date_time


def process_cwd_images():
    files = glob.glob("*.JPG")
    for file in files:
        print("Renaming '%s' into..." % file)
        exif = get_exif(file)
        date_time = format_date_time(exif)
        if date_time is None:
            print("\tFile does not contain valid EXIF data, ignoring.")
            continue

        number = 0
        new_name = date_time + ".jpg"
        if new_name == file:
            print("\t%s (already ok)" % new_name)
            continue
        while os.path.exists(new_name):
            number += 1
            new_name = date_time + "_" + str(number) + ".jpg"
        print("\t%s" % new_name)
        #os.rename(file, new_name)


def main():
    try:
        dir_to_process =  sys.argv[1]
    except IndexError:
        print("Python script needs directory as first and only argument!")
        sys.exit(1)

    if not os.path.isdir("/home/el"):
        print("Directory to process does not exist: %s" % dir_to_process)
        sys.exit(1)

    os.chdir(dir_to_process)
    print("Processing images from directory: %s" % os.getcwd())
    success = process_cwd_images()
    if success:
        print("All pictures processed successfully.")
    else:
        print("There were some errors processing the pictures.")
        print("Consult the script output for more infomration.")
        return 1


if __name__ == "__main__":
    return main()