Maybe most useful of all the scripts I made. Written to sort the photos of my cat, about 3 years ago, and all this time I kept modifying it, but I think it's finally done. :3

smfbd.py

#!/bin/env python3
"""Sort Media Files By Date

A script sorts the files using a date from an EXIF field, or a file name.
Adapted for YYYY-MM-DD date formats. A regexp is simple to alter.
A set of extensions that must be sorted can be easily changed by modifying of
a tuple ALLOWEDFORMATS.
Script builds a directory structure where it was ran.

Directory structure:
  YYYY
    |--MM
       |--DD

Example:
  2016
    |--02
       |--27
          |--files...
    |--07
       |--14
          |--files...
       |--26
          |--files...

The script uses a library Pillow.
"""

__version__ = "2.1.0"
__author__ = "Arav"
__email__ = "[email protected]"
__copyright__ = "Copyright © 2014-2018 Arav <[email protected]>"
__license__ = """
    This program is free software. It comes without any warranty, to
    the extent permitted by applicable law. You can redistribute it
    and/or modify it under the terms of the Do What The Fuck You Want
    To Public License, Version 2, as published by Sam Hocevar. See
    http://www.wtfpl.net/ for more details.
"""

from os import listdir, makedirs
from os.path import join, exists
from re import match
from shutil import move
from sys import argv

from PIL import ExifTags, Image


EXIF_TAG_DATETIME = "DateTime"
REGEXP = r".+(?P<year>\d{4})[-:]?(?P<month>\d{2})[-:]?(?P<day>\d{2}).+", # YYYY(-:)MM(-:)DD
ALLOWED_FORMATS = (
    ".png", ".jpg", ".jpeg", ".gif", ".bmp", ".tif", \
    ".mp4", ".3gp"
)

def get_exif_field(data, field):
    """Return given field's value."""
    return [v for (k, v) in data.items() if ExifTags.TAGS.get(k) == field][0]

def main():
    directory = argv[1] if len(argv) > 1 else quit()

    for file in listdir(directory):
        if not file.lower().endswith(ALLOWED_FORMATS):
            continue

        file = join(directory, file)

        try:
            exifdata = Image.open(file)._getexif()
            date = get_exif_field(exifdata, EXIF_TAG_DATETIME)
            year, month, date = date.split()[0].split(":")
        except OSError:
            re_res = match(REGEXP, file)
            if re_res:
                year, month, date = re_res.group('year'), re_res.group('month'), \
                    re_res.group('day')
            else:
                continue

        destination_directory = join(directory, year, month, date)

        makedirs(destination_directory, exist_ok=True)

        print("Moving file {}... ".format(file), end="")
        move(file, destination_directory)
        print("Done.")
    
if __name__ == "__main__":
    main()